Trump says that nobody will go to war over a tiny country like #Greenland and that the #UnitedStates can therefore do whatever he wants there.
History disagrees. #WW1 had several causes, but the most immediate was the assassination of Austrian #ArchdukeFerdinand by Serbia. Small countries. It led to WW1 because of alliances.
#Trump has no integrity, so this is lost on him, but other world leaders - our #NATO allies - are better than that.