I had this idea based on the 'Explain the AH Quote' and cultural descriptions threads.
The first person gives the name of a war. The next person explains the war who fought in it, why it happened and who won, then gives their own war for the next person. The wars are presumed to take place in separate timelines unless otherwise stated. Like the quote and cultural description game threads, the wars don't need to have occurred before 1900.
I'll start
The War of the Three Dukes