Ukraine Dependent on Arms From Allies After Exhausting Soviet-Era Weaponry

"Ukraine has depleted its stocks of Soviet and Russian-designed weaponry and is now
completely dependent on allies for arms to defend against Russia's invasion, U.S. military sources say. 

Once part of the Soviet Union, Ukraine's army and its defense industry were built around Soviet and Russian-standard equipment, small arms, tanks, howitzers and other weapons not interchangeable with those of neighbors to the west." MT