Hanoi, Vietnam (CNN) President Barack Obama announced Monday that the United States is fully lifting a decades-long ban on the sale of military equipment to Vietnam.

In a joint news conference in Hanoi with Vietnamese President Tran Dai Quang, Obama said that the removal of the ban on lethal weapons was part of a deeper defense cooperation with the country and dismissed suggestions it was aimed at countering China's growing strength in the region.

Instead, it was the desire to continue normalizing relations between the United States and Vietnam and to do away with a ban "based on ideological division between our two countries," he said.

The Vietnam War ended in April 1975 with the fall of Saigon -- now called Ho Chi Minh City -- after the United States withdrew combat forces and the North Vietnamese launched a massive offensive to reunite their homeland under communism.

While Vietnam and China are neighbors that share a communist ideology, China has aggressively claimed territory in the South China Sea, irking Vietnam and other Southeast Asian neighbors and also raising concerns internationally.

In a recent and provocative show of force, China flew two jets close to U.S. aircraft stationed in airspace above the disputed region.

Photos: Obama visits Vietnam, Japan Photos: Obama visits Vietnam, Japan President Barack Obama and Japanese Prime Minister Shinzo Abe shake hands after laying wreaths at the Hiroshima Peace Memorial Park in Hiroshima on Friday, May 27. Obama, the first sitting president to visit Hiroshima, called for a "world without nuclear weapons," during his speech but his remarks stopped short of an apology. Hide Caption 1 of 23 Photos: Obama visits Vietnam, Japan Obama told U.S. and Japanese troops on May 27 at the Iwakuni Marine Corps Air Station in Iwakuni, Japan: "This afternoon I will visit Hiroshima. This is an opportunity to honor the memory of all those who were lost in World War II." Hide Caption 2 of 23 Photos: Obama visits Vietnam, Japan President Obama greets members of the U.S. and Japanese military as he arrives at Marine Corps Air Station Iwakuni in Iwakuni on May 27. Hide Caption 3 of 23 Photos: Obama visits Vietnam, Japan From left: Italian Prime Minister Matteo Renzi, European Commission President Jean-Claude Juncker, French President François Hollande, Canadian Prime Minister Justin Trudeau, German Chancellor Angela Merkel, U.S. President Barack Obama, Japanese Prime Minister Shinzo Abe, European Council President Donald Tusk and British Prime Minister David Cameron walk past the Kagura-den as they visit Ise Jingu shrine in Ise, Japan, on Thursday, May 26. Obama is visiting Japan and Vietnam during his 10th trip to Asia. Hide Caption 4 of 23 Photos: Obama visits Vietnam, Japan World leaders join in a ceremony to plant trees at Ise Jingu shrine in Ise, Japan, on May 26. Obama and other major world leaders are in Japan for a Group of Seven, or G7, summit. Hide Caption 5 of 23 Photos: Obama visits Vietnam, Japan From left: British Prime Minister David Cameron, Italian Prime Minister Matteo Renzi, U.S. President Barack Obama and Canadian Prime Minister Justin Trudeau talk together after a group photo session at the G7 summit in Shima, Japan, on May 26. Hide Caption 6 of 23 Photos: Obama visits Vietnam, Japan U.S. President Barack Obama pauses for a translation during a bilateral meeting with Japanese Prime Minister Shinzo Abe in Shima, Japan, on Wednesday, May 25. Hide Caption 7 of 23 Photos: Obama visits Vietnam, Japan Obama is greeted by U.S. Ambassador to Japan Caroline Kennedy and her husband, Edwin Arthur Schlossberg, at the airport in Tokoname, Japan, on May 25. Hide Caption 8 of 23 Photos: Obama visits Vietnam, Japan Obama shakes hands after speaking at a town-hall event in Ho Chi Minh City, Vietnam, on May 25. Hide Caption 9 of 23 Photos: Obama visits Vietnam, Japan Vietnamese rapper Suboi raps during the town-hall event, which was for the Young Southeast Asian Leaders Initiative. Hide Caption 10 of 23 Photos: Obama visits Vietnam, Japan Obama tours through entrepreneur demonstrations in Ho Chi Minh City on Tuesday, May 24. Hide Caption 11 of 23 Photos: Obama visits Vietnam, Japan Obama pays his respects during a visit to the Jade Pagoda in Ho Chi Minh City on May 24. Hide Caption 12 of 23 Photos: Obama visits Vietnam, Japan Obama waves to locals during a visit to a shopping district in Hanoi, Vietnam, on May 24. Hide Caption 13 of 23 Photos: Obama visits Vietnam, Japan Obama shakes hands with chef Anthony Bourdain in a shopping area of Hanoi on May 24. The President sat down with Bourdain to film a scene for CNN's "Parts Unknown." Hide Caption 14 of 23 Photos: Obama visits Vietnam, Japan People gather in the rain to watch Obama's motorcade in Hanoi on May 24. Hide Caption 15 of 23 Photos: Obama visits Vietnam, Japan Obama meets with members of the Vietnamese Civil Society in Hanoi on May 24. Hide Caption 16 of 23 Photos: Obama visits Vietnam, Japan Obama delivers remarks at the National Convention Center in Hanoi on May 24. Obama made a forceful case for human rights in Vietnam and called for the "peaceful resolution" of disputes in the South China Sea. Hide Caption 17 of 23 Photos: Obama visits Vietnam, Japan Obama walks to the left of Thi Kim Ngan, chairwoman of Vietnam's National Assembly, at the Presidential Palace in Hanoi on Monday, May 23. Hide Caption 18 of 23 Photos: Obama visits Vietnam, Japan Obama meets with Nguyen Phu Trong, the Vietnamese Communist Party's general secretary, in Hanoi on May 23. Hide Caption 19 of 23 Photos: Obama visits Vietnam, Japan Obama, with Secretary of State John Kerry and other Cabinet members, attends a meeting with Vietnamese Prime Minister Nguyen Xuan Phuc, third from right, on May 23. Hide Caption 20 of 23 Photos: Obama visits Vietnam, Japan Obama gives a toast during a state luncheon hosted by Vietnam's President in Hanoi on May 23. Hide Caption 21 of 23 Photos: Obama visits Vietnam, Japan Obama holds a news conference with Vietnamese President Tran Dai Quang on May 23. Obama announced the United States is fully lifting the decades-long ban on the sale of military equipment to Vietnam. He said the removal of the ban was part of a deeper defense cooperation with the country and dismissed suggestions it was aimed at countering China's growing strength in the region. Hide Caption 22 of 23 Photos: Obama visits Vietnam, Japan The two Presidents listen to their countries' national anthems during a welcoming ceremony at the Presidential Palace in Hanoi on May 23. Hide Caption 23 of 23

At a press briefing Monday by China's Ministry of Foreign Affairs, ministry spokeswoman Hua Chunying said that it was appropriate for the ban to be lifted.

"(The) arms sales ban was a product of the Cold War and should no longer exist," she told reporters. "We hope the lifting of all such bans will benefit regional peace and development. And we are happy to see the United States and Vietnam develop normal cooperative relations."

'Developing strategic partnership'

Nguyen Ngoc Truong, president of Vietnam's Center for Strategic Studies and International Development, hailed the move as an important symbolic development between the two countries.

"This is very good news, it is of great importance for Vietnam," he told CNN. "It does not mean Vietnam will be (a) very big buyer of American weapons straight away, but (it) is important in the future. The symbolism is more important."

He said China would be watching the "developing strategic partnership" between the United States and Vietnam closely -- and said he expected it to contribute to peace and stability in the region.

"China should think twice over anything they can do to Vietnam or the South China Sea," he said. "They should get the message."

Human rights concerns

Obama defended the decision to lift the arms ban despite Vietnam's dismal record on human rights -- involving the jailing of dissidents and stalled political reforms -- saying sales would be evaluated on a "case-by-case" basis.

However, Human Rights Watch Executive Director Kenneth Roth said via Twitter that Obama was opting to "arm Vietnam as (an) anti-China ally rather than care about its ongoing repression."

Phil Robertson, deputy director of Human Rights Watch's Asia division, said that Washington had squandered a key tool to pressure Vietnam to improve its human rights record.

"In one fell swoop, President Obama has jettisoned what remained of U.S. leverage to improve human rights in Vietnam -- and basically gotten nothing for it," he said.

"President Obama just gave Vietnam a reward that they don't deserve."

In 2014, the United States eased restrictions of an arms ban that originally instated during the Vietnam War.

Obama also thanked Vietnam for its continued aid in addressing what he called "the painful legacy of war," referring to attempts to locate veterans missing in action, the removal of landmines and the cleaning up of Agent Orange.

Photos: Vietnam napalm attack In this June 8, 1972, photo taken by Associated Press photographer Nick Ut, a South Vietnamese plane drops a napalm bomb over Trang Bang village, which had been occupied by the North Vietnamese during the Vietnam War. Ut was only 21, but he was already a seasoned war photographer when he arrived at the village as it was being bombed. It was there that he took these photos -- one of which has come to define the Vietnam War. The photos are in chronological order. Hide Caption 1 of 12 Photos: Vietnam napalm attack Smoke from a napalm bomb rises over a Trang Bang church. Hide Caption 2 of 12 Photos: Vietnam napalm attack As bombs drop in Trang Bang, soldiers and members of the international media watch the scene in the foreground. Hide Caption 3 of 12 Photos: Vietnam napalm attack The aerial attack was intended for enemy forces on the outskirts of the village, but it accidentally hit South Vietnamese soldiers and civilians. Here, a man and woman carry injured children down the road following the bombing. Hide Caption 4 of 12 Photos: Vietnam napalm attack Women carry severely burned children down the road after the attack. Hide Caption 5 of 12 Photos: Vietnam napalm attack An anguished woman carries her napalm-burned child. Hide Caption 6 of 12 Photos: Vietnam napalm attack More injured people walk down the road. Hide Caption 7 of 12 Photos: Vietnam napalm attack Ut also photographed terrified children running from the site of the attack. Nine-year-old Kim Phuc, center, ripped off her burning clothes while fleeing. The powerful photograph, which won Ut a Pulitzer Prize, communicated the horrors of the war and contributed to the growing anti-war sentiment in the United States. Seven months later, the Paris Peace Accords were signed. Hide Caption 8 of 12 Photos: Vietnam napalm attack After taking the children's photograph, Ut took them to a hospital. Hide Caption 9 of 12 Photos: Vietnam napalm attack A South Vietnamese soldier crouches beside his friend who suffered severe napalm burns. Hide Caption 10 of 12 Photos: Vietnam napalm attack Injured civilians and soldiers flee from the site of the attack. Hide Caption 11 of 12 Photos: Vietnam napalm attack Television crews and South Vietnamese troops surround Phuc. Hide Caption 12 of 12

'Symbol of renewed ties'

Earlier Monday, the two leaders shook hands in front of a large bronze bust of Vietnamese communist revolutionary leader Ho Chi Minh inside the Presidential Palace.

"We've come here as a symbol of the renewed ties we have made over the last several decades and the comprehensive partnership we have created over the course of my presidency," Obama said.

Obama is on a weeklong trip to Asia to boost economic and security cooperation in the region and is expected to head south to Ho Chi Minh City before traveling to Japan.

President Bill Clinton reopened diplomatic ties with Vietnam in 1995 and in 2000 became the first president to travel there since the evacuation of U.S. civilian and military personnel 25 years earlier.

Photos: Iconic photos of the Vietnam War 1960s photojournalists showed the world some of the most dramatic moments of the Vietnam War through their camera lenses. LIFE magazine's Larry Burrows photographed wounded Marine Gunnery Sgt. Jeremiah Purdie, center, reaching toward a stricken soldier after a firefight south of the Demilitarized Zone in Vietnam in 1966. Commonly known as Reaching Out, Burrows shows us tenderness and terror all in one frame. According to LIFE, the magazine did not publish the picture until five years later to commemorate Burrows, who was killed with AP photographer Henri Huet and three other photographers in Laos. Hide Caption 1 of 16 Photos: Iconic photos of the Vietnam War Associated Press photographer Nick Ut photographed terrified children running from the site of a Vietnam napalm attack in 1972. A South Vietnamese plane accidentally dropped napalm on its own troops and civilians. Nine-year-old Kim Phuc, center, ripped off her burning clothes while she ran. The image communicated the horrors of the war and contributed to growing U.S. anti-war sentiment. After taking the photograph, Ut took the children to a Saigon hospital. Hide Caption 2 of 16 Photos: Iconic photos of the Vietnam War Eddie Adams photographed South Vietnamese police chief Gen. Nguyen Ngoc Loan killing Viet Cong suspect Nguyen Van Lem in Saigon in 1968. Adams later regretted the impact of the Pulitzer Prize-winning image, apologizing to Gen. Nguyen and his family. "I'm not saying what he did was right," Adams wrote in Time magazine , "but you have to put yourself in his position." Hide Caption 3 of 16 Photos: Iconic photos of the Vietnam War A helicopter raises the body of an American paratrooper killed in action in the jungle near the Cambodian border in 1966. Henri Huet, a French war photographer covering the war for the Associated Press, captured some of the most influential images of the war. Huet died along with LIFE photographer Larry Burrows and three other photographers when their helicopter was shot down over Laos in 1971. Hide Caption 4 of 16 Photos: Iconic photos of the Vietnam War Legendary Welsh war photographer Philip Jones Griffiths captured the battle for Saigon in 1968. U.S. policy in Vietnam was based on the premise that peasants driven into the towns and cities by the carpet-bombing of the countryside would be safe. Furthermore, removed from their traditional value system, they could be prepared for imposition of consumerism. This "restructuring" of society suffered a setback when, in 1968, death rained down on the urban enclaves. In 1971 Griffiths published "Vietnam Inc." and it became one of the most sought after photography books. Hide Caption 5 of 16 Photos: Iconic photos of the Vietnam War Newly freed U.S. prisoner of war Air Force Lt. Col. Robert L. Stirm is greeted by his family at Travis Air Force Base in Fairfield, California, in 1973. This Pulitzer Prize-winning photograph, named Burst of Joy, was taken by Associated Press photographer Sal Veder. "You could feel the energy and the raw emotion in the air," Veder told Smithsonian Magazine in 2005. Hide Caption 6 of 16 Photos: Iconic photos of the Vietnam War This 1965 photo by Horst Faas shows U.S. helicopters protecting South Vietnamese troops northwest of Saigon. As the Associated Press chief photographer for Southeast Asia from 1962-1974, Faas earned two Pulitzer Prizes. Hide Caption 7 of 16 Photos: Iconic photos of the Vietnam War Oliver Noonan, a former photographer with the Boston Globe, captured this image of American soldiers listening to a radio broadcast in Vietnam in 1966. Noonan took leave from Boston to work in Vietnam for the Associated Press. He died when his helicopter was shot down near Da Nang in August 1969. Hide Caption 8 of 16 Photos: Iconic photos of the Vietnam War In June 1963, photographer Malcolm Browne showed the world a shocking display of protest. A Buddhist monk named Thich Quang Duc burned himself to death on a street in Saigon to protest alleged persecution of Buddhists by the South Vietnamese government. The image won Browne the World Press Photo of the Year. Hide Caption 9 of 16 Photos: Iconic photos of the Vietnam War Tim Page photographed a U.S. helicopter taking off from a clearing near Du Co SF camp in Vietnam in 1965. Wounded soldiers crouch in the dust of the departing helicopter. The military convoy was on its way to relieve the camp when it was ambushed. Hide Caption 10 of 16 Photos: Iconic photos of the Vietnam War Frenchman Marc Riboud captured one of the most well-known anti-war images in 1967. Jan Rose Kasmir confronts National Guard troops outside the Pentagon during a protest march. The photo helped turn public opinion against the war. "She was just talking, trying to catch the eye of the soldiers, maybe try to have a dialogue with them," recalled Riboud in the April 2004 Smithsonian magazine, "I had the feeling the soldiers were more afraid of her than she was of the bayonets." Hide Caption 11 of 16 Photos: Iconic photos of the Vietnam War In this 1965 Henri Huet photograph, Chaplain John McNamara administers last rites to photographer Dickey Chapelle in South Vietnam. Chapelle was covering a U.S. Marine unit near Chu Lai for the National Observer when a mine seriously wounded her and four Marines. Chappelle died en route to a hospital, the first American woman correspondent ever killed in action. Hide Caption 12 of 16 Photos: Iconic photos of the Vietnam War Mary Ann Vecchio screams as she kneels over Jeffrey Miller's body during the deadly anti-war demonstration at Kent State University in 1970. Student photographer John Filo captured the Pulitzer Prize-winning image after Ohio National Guardsmen fired into a crowd of protesters, killing four students and wounding nine others. An editor manipulated a version of the image to remove the fence post above Vecchio's head, sparking controversy. Hide Caption 13 of 16 Photos: Iconic photos of the Vietnam War For his dramatic photographs of the Vietnam War, United Press International staff photographer David Hume Kennerly won the 1972 Pulitzer Prize for feature photography. This 1971 photo from Kennerly's award-winning portfolio shows an American GI, his weapon drawn, cautiously moving over a devastated hill near Firebase Gladiator. Hide Caption 14 of 16 Photos: Iconic photos of the Vietnam War Hubert Van Es, a Dutch photojournalist working at the offices of United Press International, took this photo on April 29, 1975, of a CIA employee helping evacuees onto an Air America helicopter. It became one of the best known images of the U.S. evacuation of Saigon. Van Es never received royalties for the UPI-owned photo. The rights are owned by Bill Gates through his company, Corbis. Hide Caption 15 of 16 Photos: Iconic photos of the Vietnam War Associated Press photographer Art Greenspon captured this photo of soldiers aiding wounded comrades. The first sergeant of A Company, 101st Airborne Division, guided a medevac helicopter through the jungle to retrieve casualties near Hue in April 1968. Hide Caption 16 of 16

Record plane deal

Earlier Monday, Obama and Quang also witnessed the signing of a record $11.3 billion deal between Boeing and local airline VietJet.

VietJet's order of 100 737 jets is the largest commercial plane order in Vietnamese history.

Thanks @vietjetvietnam for helping us make history with an order for 100 737 MAXs. https://t.co/gfVRW1o59y #Boeing pic.twitter.com/QfEhcR3XV1 — Boeing Airplanes (@BoeingAirplanes) May 23, 2016

Obama also announced that for the "first time" the Peace Corps will be coming to Vietnam. The President said the Peace Corps will focus on teaching English there.