1. Where were they mainly used 

    a. In the Battle of the Atlantic Charter.

2. How many were used in the battle

     a. 1,000 were used in the battle.

3. How many u-boats were sunk

    a. 800 u-boats were sunk.

4. How many allied ships were sunk

    a. 2,900 allied ships were sunk.

5. What was the best u-boat

    a. First of all they were the best thing to use.

    b. The best one was called the "Wolf pack" ("German U-boats and Battle of the Atlantic Charter").

6. What weapons does it have