The Scorpion, commissioned as B-427, patrolled the seas or welcomed tourists during a consistently volatile time for the relationship between its old home, the former Soviet Union/Russia and its current home, the United States. Here’s a look at that period of history:

SOVIET SUBMARINE B-427

1972: Construction completed, at Leningrad’s Sudomekh Shipyard

1972: B-427 is launched

1972: Commissioned by the Soviet Navy

1972-1994: Based out of Vladivostok, B-427 patrolled the ocean, protecting Russia’s Pacific Fleet

1989: While returning to Vladivostok from Vietnam, the sub was damaged by a typhoon. The B-427 was docked at Vladivostok for weeks while it was repaired.

1994: Sub decommissioned by the Russian Navy

July 1995: An Australian company leases the sub for three years, intending to display it near a museum off the coast of Sydney.

August 1995: The sub opens as an attraction at the Australian National Maritime Museum.

May 1998: B-427 is sold to Ed Skowron of Palm Springs and begins its journey to Long Beach

June 1998: The sub arrives in Long Beach. It cost $970,000 to have it transported.

July 1998: The sub opens to the public, moored next to the Queen Mary. It is billed as Podvodnaya Lodka B-427 Scorpion.

1998-2015: The sub operates as a tourist attraction, drawing an average of 7,900 a month during the peak summer season.

January, 2011: A new lease is signed for the attraction.

June 23, 2015: The hull ruptures and floods a ballast tank. The attraction is closed to the public.

June 2016: Skowron’s company Newco sues the sub’s operator and other groups that had a stake in the sub for $10 million in damages. Skowron is fighting the sub’s removal from alongside the Queen Mary.

U.S. RUSSIAN RELATIONS

September 1971: In the midst of the Cold War and almost a decade after the Cuban missile crisis, Soviet leader Nikita Khrushchev dies.

September 1972: Bobby Fischer of the U.S. defeats Russia’s Boris Spassky for the world chess championship.

July 1975: A joint space flight between Apollo and Soyuz programs unofficially brings an end to the space race.

December 1979: Russian troops storm into Afghanistan to bolster the country’s new pro-Soviet leadership.

March 1980: In response to the Afghan invasion, President Jimmy Carter says the U.S. will boycott the Summer Olympic Games in Moscow.

July 1984: The Soviets retaliate by leading a communist-bloc boycott of the Summer Olympic Games in Los Angeles.

November 1985: President Ronald Reagan and Russian President Mikhail Gorbachev stage the first of their four summit meetings in Switzerland.

October 1986: Reagan orders 55 Soviet diplomats in Washington and San Francisco to leave the U.S., shortly after expelling 25 others from the Soviet mission to the United Nations.

October 1987: Reagan challenges Gorbachev to tear down the Berlin Wall.

December 1989: Presidents Reagan and Gorbachev declare the Cold War at an end.

January, 1991: U.S., Russia wage Persian Gulf War against Iraq, a longtime Soviet ally.

February 2001: Veteran FBI agent, Robert P. Hanssen is arrested and charged with committing espionage for Russia by providing highly classified national security information to intelligence officers.

July 2010: In the biggest spy swap since the Cold War, 10 confessed Russian agents who infiltrated suburban America as “sleeper” agents were deported in exchange for four people convicted of betraying Moscow.

December 2012: President Vladimir Putin signs a ban on adoptions of Russian children by American citizens.

May 2013: U.S. diplomat expelled after Kremlin’s security services said he tried to recruit Russian agent. Officials displayed tools straight from a spy thriller: wigs, packets of cash, a knife, map and compass, and letter promising millions for “long-term cooperation.”

January 2017: President Barack Obama imposes sanctions and expels 35 Russian diplomats over alleged Russian interference in the 2016 presidential election.

March 2017: With Russia-tinged investigations swirling around his administration, President Donald Trump still vows to fulfill a campaign pledge of closer cooperation with Moscow. Secretary of State Rex Tillerson plans diplomatic trek to Russia.

Sources: The Associated Press, Ed Skowron