After 100 days Russia only controls 20% of Ukraine.
LOL! After 8 years, Ukraine couldn't take 2 tiny states that were armed with Mosins!
If this country were invaded and 20% (1/5) of it were held by a foreign military force in 100 days it would in no way be deemed positive. As it is in Ukraine it would be a disaster.
Russia very well might take serious action to stop the supply of arms by outside countries to its enemy.