Donald Trump has launched a fresh attack on his NATO allies, claiming European troops “stayed off the front lines” in Afghanistan. This latest barb came hours after NATO’s secretary general, Mark Rutte, delivered a swift reality check to the US President after he claimed his allies “would not be there for us” if America needed help.

An estimated 3,500 soldiers from NATO countries died in Afghanistan. The United States suffered the most losses in absolute terms: Nearly 2,500 U.S. service members were killed in the 20-year war. But per capita, Denmark suffered even more severe losses, burying 43 soldiers in a population, at the time, of about 5.5 million.