On Monday, Europe crossed yet another red line in its ever-escalating, no-longer-so-proxy war against Russia. In a hastily arranged meeting of European leaders in Paris - a response to significant Russian breakthroughs on the Ukrainian frontline over the past few weeks - Emmanuel Macron shattered one of the few taboos left in Western circles by saying that sending Nato troops to Ukraine should not be ruled out. "We must do everything necessary to prevent Russia from winning the war," he declared, adding that France could even take such action without the consent of other EU members because...