This is true, and it refers to the empress Leizu who lived around the time, and who is believed to have discovered silk. However, the earliest sources speak of 3500 BC- so a lot earlier, but yes, they could produce silk by 2700 BC
The Three-Fifths Compromise determined that 3 out of 5 slaves would be counted as people, giving the South an advantage in Congress
The sinking of the U-boat by the Germans, the U-boat had about 100 Americans in it and they were killed.
