Players start with 2 TCs, 8 Army Tents, 13 Villagers, 10 Camel Scouts, 10 Skirmishers, 10 Spearmen and 1 default scouting unit. Regicide adds a Castle, while Empire Wars adds a Barrack and a Blacksmith. Comes in 7 themes (Asian, Autumn, Desert, Grassy, Mediterranean, Tropical and Winter).
AoE2 replaces all SCOUT objects with the civ's default scouting unit. Because I didn't want Mesoamerican civilizations to start with 10 Eagle Scouts, I decided to set the 10 extra scouting units to be Camel Scouts.