I think the headlines greatly misrepresented the reality. They made it seem like he wanted to go to war when he basically said that France and Europe can't rely on the US for protection anymore.
When I see President Trump announcing that hes quitting a major disarmament treaty which was formed after the 1980s Euromissile crisis that hit Europe, who is the main victim? Europe and its security, he said in a radio interview to mark 100 years since the end of hostilities. Peace in Europe is precarious."
https://www.theguardian.com/world/2018/nov/06/macron-calls-for-real-european-army-at-start-of-war-centenary-tour