Vice Grip on the Vistula

About War Without Mercy, from BoardGameGeek:

War Without Mercy is the first of three games in Clash of Arms's Struggle for Europe series. It includes the entire east front including the invasion of Poland which is an introductory scenario. The game scale is 30 miles per hex, two weeks per turn with units at division and corp level. When the final two games are published all three games can be combined to play all of WW2 in Europe and North Africa.