In fact the unification of Japan is a historical moment that connects both aoe 2 with aoe 3…Kyoto (1582 with Nobunaga and Hideyoshi),Noryang Point (1598 with Hideyoshi as an enemy) and the Japanese campaign of aoe 3 (1600 with Tokugawa)…the other historical moment would be the siege of Malta in 1565 (which appears at the beginning of Morgan Black’s campaign aka Blood campaign in aoe 3) and the historic battle of Lepanto (1571) of aoe 2…