Manual is also available in-game. Does the job. Can be a bit clunky. Voluminous manual and good online docs. Realistically, the only choice in a true strategic computer wargame.
Games take a looooong time.
Weird rules implementation bugs crop up occasionally. Graphics rather dated for people who care about that sort of thing. Well, I had to see it to believe it, but version 2.0 of Computer War in Europe is here at last. I received my copy this fall after purchasing v1.86 last year. As a result, the current version had been out for over three months before we loyal veterans who signed up long ago got our due.