What economic choices the economy to become unstable in the late 1920's

The biggest one is speculation on the market. Many would buy stocks on margin, say only meeding 10% of the share amount to buy a share of stock. So great quantities of stock were able to be bought without necesarily having the money to legitimately purchase them.

Siege of Yorktown, joint Franco-American land and sea campaign that entrapped a major British army on a peninsula at Yorktown, Virginia, and forced its surrender. The siege virtually ended military operations in the American Revolution.

Start date: September 28

End date: October 19, 1781