North Korea said it is ready for "all-out war" as it paraded an array of military hardware in celebration of the birthday of the country's late founder.
Leader Kim Jong Un looked on in delight during festivities celebrating the 105th birthday of his late grandfather Kim Il Sung in Pyongyang, the capital.
The celebration took place amid rising concerns that North Korea is possibly preparing for its sixth nuclear test or a significant rocket launch, such as its first flight test of an ICBM.
A senior military official warned the country is ready to respond to any threat posed by United States - accusing President Trump of "creating a war situation".
Footage of the parade appeared to show several KN-08 and KN-14 missiles which, according to military analysts, could one day be capable of hitting targets as far as the US.
North Korean soldiers also rolled out what appeared to be another large rocket, covered by a canister, as well as tanks, rocket launchers, artillery guns and a solid-fuel missile designed to be fired from submarines.
Also on display was a powerful midrange missile that outside analysts call a "Musudan," and which can potentially reach US air bases in Guam.
And there was a new solid-fuel midrange missile that can be fired from land mobile launchers, making them harder to detect before launch.
Military official Choe Ryong Hae, who some say is the second-most powerful politician in North Korea, said in a speech that the country is ready to stand up to any threat posed by the US.
He criticised President Donald Trump for "creating a war situation" on the Korean Peninsula by dispatching strategic military assets to the region.
"We will respond to an all-out war with an all-out war and a nuclear war with our style of a nuclear attack," Mr Choe said.
US satellite imagery suggests the country could conduct another underground nuclear test at any time.
North Korea conducted two of such tests last year alone, which analysts say would have taken the country a step forward in gaining the knowledge to make nuclear weapons small enough to fit on long-range missiles.
The North also last year launched a long-range rocket that put a satellite into orbit, which Washington, Seoul and others saw as a banned test of missile technology.
Amid the elevated tensions, the US a few days ago dispatched what Mr Trump called an "armada" of ships in a show of force, including an aircraft carrier, into waters off the Korean Peninsula.
The move, coupled with the US retaliatory strikes against Syria over a chemical weapons attack on civilians, touched off fear in South Korea that the United States was preparing for military action on the North.
However, US officials said on Friday that Mr Trump's policy will emphasise increasing pressure on Pyongyang with the help of China, North Korea's only major ally, instead of military options or trying to overthrow Mr Kim's leadership.
A US military official said the US does not intend to use military force against North Korea in response to either a nuclear test or a missile launch.
Additional reporting from AP.