They controlled the armies that were used to provide military service to the shogun when required, samurai were minor nobles and held their land under authority of daimyo. their position was hereditary, below the samurai was foot soldiers
He refused to attack Lafayette's troops in the South and he also disregarded an order and retreated to Yorktown Peninsula where he expected help from British naval ships but they did not come so he was forced to surrender.
The firts question, the answer is D.Cultural Exchange
I believe that it is sapien
According to what I have learned, in 2000 B.C, they were being built all over Sumerian cities. As for when they were first built, I would say the third millennium B.C. Forgive me if this information is incorrect.