President Donald Trump began his first speech to the UN Tuesday with a vow to 'totally destroy' North Korea's Kim Jong-un if his regime threatens the United States, as he talked up the 'vast military power' of the United States.

'Rocket man is on a suicide mission for himself and for his regime,' Trump warned gathered world leaders, picking up a derisive term from one of his tweets over the weekend.

Trump began his remarks at the United Nations with a brash statement of U.S. military might as he defended his 'America first' agenda to a group of world leaders.

Tough message: 'As president of the United States I will always put America first,' Trump told the United Nations

America first: Trump took his nationalist message to the United Nations in New York and tore into North Korea

Grand setting: Trump stood in front of the world leaders assembled at the United Nations General Assembly in New York

The president used his speech to the 193-nation body to call out ‘loser terrorists,’ the ‘corrupt’ government in Venezuela, and the ‘murderous’ Iranian regime, and ‘rogue regimes’ generally.

He combined his explosive rhetoric with repeated assertions of U.S. military might, and a demand that the UN live up to its founding principles of collective action and self-determination for nations.

While he laced his remarks with a few policy ideas – calling the Iran deal negotiated by President Barack Obama and a group of nations an ‘embarrassment – he didn’t reveal any specific new diplomatic or military plans intended change the behavior of nations like North Korea that have resisted repeated pressure from the UN Security Council.

The president referenced starvation, corruption, and threats, saying 'major portions of the world are in conflict and some in fact are going to hell.'

Trump, who during his campaign said the UN was not a 'friend' to the U.S., did include calls for collective action.

'We must work together and confront together those who threaten us with chaos, turmoil, and terror,' he said.

I'm off: North Korea's Ambassador to the U.N., Ja Song Nam, walked out as Donald Trump arrived at the United Nations building

Where's Kim's team gone? Seats allocated to North Korea were empty during the speech

'As president of the United States I will always put America first just like you the leaders of your countries will always and should always put your countries first,' Trump said

'It has just been announced that we will be spending almost $700 billion on our military and defense,' Trump said world leaders who gathered to hear his debut remarks at an institution he has blasted in the past.

'Our military will soon be the strongest it has ever been.'

He also talked up the U.S. economy.

'Fortunately, the United States has done very well since election day,' Trump said, earning his first faint applause for that line about 15 minutes into his speech.

'It has just been announced that we will be spending almost $700 billion on our military and defense.

'Our military will soon be the strongest it has ever been,' Trump said near the top of his remarks.

Trump tore into Kim Jong-un's regime while North Korea's place in the front row at the world body stood empty. Its main diplomat walked out as Trump arrived.

'No one has shown more contempt for other nations and for the well-being of their own people than the depraved regime in North Korea,' Trump said in a lengthy passage about the regime following its missile and nuclear tests.

'It is responsible for the starvation deaths of millions of North Koreans. And for the imprisonment, torture, killing and oppression of countless more.'

'It is an outrage that some nations would not only trade with such a regime, but financially support a country that imperils the world with nuclear conflict. No nation on earth has an interest in seeing this band of criminals arm itself with nuclear weapons and missiles,' Trump said.

'Now their reckless pursuit of nuclear weapons and ballistic missiles threatens the entire world with unthinkable loss of human life.'

'The United States has great strength and patience, but if it is forced to defend itself or its allies, we will have no choice but to totally destroy North Korea,' Trump said.

Get the message: 'Our military will soon be the strongest it has ever been,' Trump said near the top of his remarks.

Ready for business: Trump arrives with the First Lady Melania Trump before his bomb-throwing speech which targeted nation after nation

American delegation: Treasury Secretary Steve Mncuchin, Secretary of State Rex Tillerson and Nikki Haley were watching from the U.S.'s allocated seats as Trump went on the offensive

His threat to 'totally destroy' Kim Jong-un created an immediate buzz inside the assembly hall.

When the speech was over, Trump told reporters: 'I think it went really well. I said what I had to say,' according to Fox News.

And later that evening, he tweeted that his maiden speech at the UN had been a roaring success.

'A great and important day at the United Nations,' he wrote.

'Met with leaders of many nations who agree with much (or all) of what I stated in my speech!'

But those outside the UN were less agreeable to Trump.

As night fell on the United Nations headquarters, protesters gathered to demonstrate against Trump's support of Israel and its conflict with Palestine.

One woman held a sign saying 'Stop racism. Stop Netanyahu. Stop Trump.'

Some of the protesters were Jewish, including two Orthodox Jewish men with a sign that read 'State of "Israel" does not represent world Jewry.'

Later in the day, demonstrators gathered outside the UN to protest Israel's treatment of Palestinians. This woman's sign reads 'Stop racism, stop Netanyahu. Stop Trump'

Some of the protesters were Jewish, such as these men, who held up signs reading 'Judaism yes! Zionism no! State of Israel must go!'

After issuing his grave warning to North Korea, Trump expanded his speech to other 'rogue nations' and went after Iran, Venezuela, and those who aide terrorists.

A day after criticizing the Iran nuclear agreement in meetings with world leaders including Israeli Prime Minister Benjamin Netanyahu, Trump blasted the Islamic Republic.

'The Iranian government masks a corrupt dictatorship behind the false guise of a democracy. It has turned a wealthy country with a rich history and culture into an economically depleted rogue state whose chief exports are violence, bloodshed and chaos,' Trump said.

'The longest suffering victims of Iran's leaders are, in fact, its own people. Rather than use its resources to improve Iranian lives, its oil profits go to fund Hezbollah and other terrorists that kill innocent Muslims and attack their peaceful Arab and Israeli neighbors.'

'This wealth, which rightly belongs to Iran's people, also goes to shore up Bashar al-Assad's dictatorship, fuel Yemen's civil war and undermine peace throughout the middle east.'

'We cannot let a murderous regime continue these destabilizing activities while building dangerous missiles.

'And we cannot abide by an agreement if it provides cover for the eventual construction of a nuclear program,' he said, earning some applause – including from Israeli Prime Minister Benjamin Netanyahu and the Israeli delegation.

He blasted the deal negotiated with Iran and a group of six other nations, calling it an 'embarassment.'

Listening intently: The Iranian representative kept his eyes down as Trump went for the jugular against the 'embarrassment' of the nuclear deal Obama negotiated

Socialist calamity: Trump went after Venezuela's hard-left government as its delegates watched and said: 'This corrupt regime destroyed a prosperous nation.'

'The Iran deal was one of the worst and most one-sided transactions the United States has ever entered into.

'Frankly, that deal is an embarrassment to the United States and I don't think you've heard the last of it, believe me.

'It's time for the entire world to join us in demanding that Iran's government end its pursuit of death and destruction. It is time for the regime to free all Americans and citizens of other nations that they have unjustly detained.

'And above all, Iran's government must stop supporting terrorists, begin serving its own people and respect the sovereign rights of its neighbors.'

Trump also went after Venezuela, following the imposition of U.S. sanctions amid chaos and government-backed violence against protesters.

'The Venezuelan people are starving and their country is collapsing,' Trump said, a day after convening a meeting with Latin American leaders on the subject. 'This situation is completely unacceptable and we cannot stand by and watch,' said Trump.

'This corrupt regime destroyed a prosperous nation,' Trump said.

Following a year where multiple nations endured terror attacks, Trump called to 'crush the loser terrorists and stop the reemergence of safe havens they use to launch attacks.'

'It is time to expose and hold responsible those countries who support and finance terror groups like Al Qaeda, Hezbollah, the Taliban, and others that slaughter innocent people,' Trump said.

Even with his threats of military action, Trump tried to include a few soaring lines in his speech, calling for a 'great reawakening of nations,' and saying: 'We need to defeat the enemies of humanity and unlock the potential of life itself.'

Trump ended his remarks by saying: 'God bless you, God bless the nations of the world, and God bless the United states of America.'