The Operational Art of War games in order

All 4 games of the The Operational Art of War series in the order they came out, from The Operational Art of War I: 1939–1955 (1998) to The Operational Art of War IV (2017).

1. 
   The Operational Art of War I: 1939–1955PC
   31 May
2. 
   The Operational Art of War II: Modern Battles 1956–2000PC
   30 Apr
3. 
   The Operational Art of War IIIPC
   5 Jun
4. 
   The Operational Art of War IVPC, Windows 7 · Matrix Games (pub.)
   15 Nov