DPR formed a unit of ex Ukrainian prisoners

A battalion of Ukrainian prisoners of war was formed in the DNR

What was the reason that led the army to switch sides?

Executions of unarmed prisoners of war?

Their shelling of schools and hospitals, houses, civilians?

Remain in the same unit with pure fascists who openly adorned themselves with symbols of Nazi troops?

There are many reasons, but the truth is one, and the choice is one. Now they are on the right side.