Russia has made various gains also.
The Ukrainian army has lost around 120,000 men, much more than the Russians.
There are reports of large numbers of Polish military fighting in Ukraine.
It is a full on proxy war.
Russia would have had no excuse to invade if the west/Ukraine had not helped overthrow Yanukovych and spent the last 8 years attacking ethnic Russians in the Donbass region instead of keeping to the Minsk accords.
Those reports are from Russian propaganda
There are no Polish military fighting in Ukraine. I'm here in Poland and can tell you that my brother in law in the military isn't in Ukraine, neither are his buds, nor anyone else he knows in the military
If even one Polish soldier was in Ukraine, there would be lots of news about it
“There are reports of large numbers of Polish military fighting in Ukraine.”
Sources ?