Its a civil war
A civil war that involves another nation stirring up the rebels and providing them with arms and troops? That doesn’t sound like a civil war to me.
So if La Raza and Aztlan terrorists began to seize towns and territory in Arizona and Texas and fight the National Guard and Border Patrol bringing in armaments from Mexico that would be a "civil war" too???
All of the polls, both by international organizations and national in Ukraine, as well as the official election that took place in most of the East and South, that the separatists only enjoy a minority of support. More than half of the dead have been Russkies from Russia.
It is a undeclared war with Russia.