Artillery.

This is coolbert:

Artillery to include rockets and conventional tube artillery [self-propelled] firing from Russian territory into Ukraine now confirmed!

"US says photos show Russian artillery fired on Ukraine"

"The United States on Sunday released satellite images to bolster its claim that Russian artillery has fired across the border into Ukraine, targeting government forces in support of separatist rebels."
. . . .

"Two show what the US government alleges are Russian batteries on its own territory -- one group of multiple rocket launchers and another of self-propelled howitzers."

"Pictures also show impact craters near military positions on the Ukrainian side of the frontier."

This is an escalation of hostilities without question. Small arms not now merely sufficing but heavy weaponry entering the fray an bad indication!

coolbert.