family members

Two of my uncles perished in WW2. One was a Bill Meheruk who was born in Kitsman a clty near Chernivtsi, Ukraine. The other was John Greckul who was born in Lashkiwka a village near Kitsman. I have no idea which armies they were involved with. I think that they died in 1944. Their bodies never returned to their places of residences. Anyone have any ideas how I can find where they may be buried?