WW2 Eastern front strategic game in which units conduct combat during the movement phase by expending movement points.
Corps / Army scale. There isn't a combat phase in ToS. All combat is done somewhat like overruns in the operations phase. A unit in range of a HQ can roll for initiative to react when a combat is declared. Each HQ gets to do this once during the opponents turn.
The air and naval aspect of the game is fairly simple. There are Armor effects in combat and rules to allow more than one stack at a time to combine their movement. When Armor effects are used the Tanks must take the first loss if any (you will see the way those Panzers get worn down in Barbarossa). Losses are by step with possible retreats and even morale rolls to hold your ground and take more losses instead of retreating.
There is limited intelligence with many units off the map (Army / Front markers). You can only see the top unit in a stack.