The US vice-president, J.D. Vance, recently declared that he “doesn’t give a shit” if the Trump administration’s strike on a suspected Venezuelan gang boat is called a “war crime”. In a speech to hundreds of senior US military officers weeks later, the defense secretary, Pete Hegseth, then called for troops to ignore “stupid rules of engagement”.
These anecdotes are a reminder that, for all the focus on President Donald Trump’s overt attacks on democratic institutions at home, his administration’s approach to the law of armed conflict – the corpus of laws governing how militaries fight wars – is just as suspect.
In my upcoming book, Killing Machines: Trump, the Law of War, and the Future of Military Impunity, I make the case that Trump is unique among US presidents in the extent of his willingness to discard the law of war. This doesn’t mean that all of Trump’s predecessors in the White House have meticulously followed the law to the letter – far from it.
