Other significant product lines appeared by producers GDW and Clash of Arms Games ("CofA"). GDW focused on the Cold War or World War III period with "Team Yankee", the first product of its "First Battle Series" line of games. Later offerings moved this system to cover several post-Cold war scenarios, such as Desert Storm, and also back to Second World War. CofA produced "Landships!" which covers the First World War, primarily focusing on the appearance of tanks during the later years on the Western Front. Subsequent expansions moved the system to cover the Russian Civil War and CofA intends to move the series up to 1939, covering the Chaco War, the Spanish Civil War and the German invasion of Poland in World War II.