War of 1812: Battle of Stoney Creek: A British force of 700 under John Vincent defeats an American force twice its size under William Winder and John Chandler.
World War I: Battle of Belleau Wood: The U.S. Marine Corps suffers its worst single day's casualties while attempting to recapture the wood at Château-Thierry.
New Deal: The U.S. President Franklin D. Roosevelt signs the Securities Exchange Act of 1934 into law, establishing the U.S. Securities and Exchange Commission.