Speaking to more than 2,500 US and Japanese military personnel on the flight deck of the USS Ronald Reagan as it was moored in the US naval base at Yokosuka, 50 miles south-west of Tokyo, Mr Pence warned Pyongyang not to test the resolve of President Trump or the US military.
“Storm clouds gather on the horizon”, said Mr Pence.
“North Korea is the most dangerous and urgent threat to the peace and security of the Asia-Pacific”, he said.
“As President Trump has made clear to the world, the era of strategic patience is over”, he said.
Any North Korean use of conventional or nuclear weapons will be met with an “overwhelming and effective” response from the US military in the region, he warned.