Veterans and bereaved families call the comments insulting, as the prime minister's spokesperson says "we are incredibly proud of our armed forces."

The president also suggested the U.S. should have “put NATO to the test” to advance his domestic agenda.

U.S. President Donald Trump has provoked outrage and distress in the U.K. with his suggestion that troops from NATO countries stayed away from the frontline during the war in Afghanistan.

President Trump suggested the U.S. should have tested NATO’s commitment by invoking Article 5 in response to the southern border crisis.

In a Truth Social post, President Trump suggested putting the world’s strongest military alliance “to the test” by invoking its mutual defense clause.

Perspective: Trump's latest NATO broadside outrages America's allies amid lingering doubts over the alliance's future.

NATO chief Mark Rutte says U.S. versus Danish control of Greenland was not discussed in his talks with President Donald Trump, which led to an agreement on new Greenland "framework."

NATO General Secretary Mark Rutte explained to FOX News' 'Special Report,' that President Trump has pushed NATO countries into increasing their defense spending: MARK RUTTE: As I said this morning and a panel address,