Playing as Germany in 1914 and decided to try the opposite of the Schleiffen plan. In other words, play defense in the West, and go on the offense in the East. Declare war on France to keep it honest, but don't attack Belgium and thereby keep the British at peace. Build units on the Western front to keep pace with the French numbers (or close at least), but don't attack there.
By late 1916, I had Moscow. Of course hindsite is 20-20, but do any of you think this would have worked in real life?