Did Russia just invade Ukraine? What we know and don't know

Zack Beauchamp
Did Russia just invade Ukraine? What we know and don't know

On Friday, as a Russian "aid convoy" of 280 trucks crossed the Ukrainian border, NATO said that the Russian military was sending Russian-manned artillery units into rebel-held eastern Ukraine, which certainly sounds like a formal military invasion, though NATO and the US have declined to call it that. This comes one week after a separate "incursion" of Russian military forces had crossed into eastern Ukraine, raising surprisingly difficult to answer questions about whether this now constituted a formal war between Russia and Ukraine. Did Russia really invade Ukraine outright?