The EU has had the chance to step up to defend Ukraine with military aid, but seems to be hamstrung by entrenched interests in its nuclear powers, and a lack of desire to act outside the shadow of the US. I've been first in line to criticize the US military over the past few decades, including for its sheer size that makes it ripe for abuse (eg invasion of Iraq), but genocidal-resurgent Russia has shown that history hasn't ended quite yet.