You are Yamato (Blue), and there are three enemy teams: the brown Kibi, the yellow Kibi, and the red Izumo (all Shang). You start in the Stone Age with nothing but a Town Center, a few Villagers, and two Watch Towers. Those towers will protect you as you build up a base. Train some more Villagers, gather food and wood, and age up as soon as possible. Fishing will be a waste of time, as there's too little fish on the map, but the island to the west holds quite a lot of food if you get Villagers there - there's also gold and wood to pay for your expansion.