Slitherine offers the release of Panzer Corps : Allied Corps, choosing D-Day to release this World War II strategy game they call a spiritual successor to Allied General. Here's word on the game, which is a standalone release, and does not require the original Panzer Corps to play:

The Allied Corps Campaign takes the award winning Panzer Corps game system and puts you in command of the Western Allies. Starting in the Western Desert and commanding the British 8th Army, the player takes on Italian forces with support from the German Afrika Korps. The war then moves on to Sicily and then must fight their way up Italy against stiff German resistance. In 1944 a new front will be opened by Operation Overlord, D-Day, and then push on to the Rhine and Berlin.

Panzer Corps: Allied Corps is an expansion for existing Panzer Corps owners and a full stand-alone for new players. Allied Corps includes more than 25 new scenarios, over 50 new regular and special elite units, and modified version of existing units to cover the entire war in detail from the Western Allies perspective.