Global Diplomacy

Global Diplomacy (GD) and Age of Discovery (AoD) are two variants of a play-by-email wargames run by Email Games. The games simulate strategic-level warfare and diplomacy at a late-19th century (c. 1880) technology level. The smallest units are of corps and squadron size. Whereas "Global Diplomacy" (and its sequel "Global Diplomacy 2") attempt to simulate a world war, on Earth during the era of New Imperialism, "Age of Discovery" uses a randomly created map and world. There are a few other small differences between the two games. 
"GD" and "AoD" are derived from the board game, "Diplomacy".