Portal:United States/Anniversaries/June/June 22

1807 – In the Chesapeake–Leopard Affair (pictured), the British warship HMS Leopard attacks and boards the American frigate USS Chesapeake.
1825 – The British Parliament abolishes feudalism and the seigneurial system in British North America.
1944 – President Franklin D. Roosevelt signs into law the Servicemen's Readjustment Act of 1944, commonly known as the G.I. Bill.
1945 – The Battle of Okinawa, the largest amphibious assault in the Pacific War of World War II, ends when organized resistance of Imperial Japanese Army forces collapses in the Mabuni area on the southern tip of the main island. Over 12,000 American and British servicemen would die over the 82 day long battle, including commanding Lt. General Simon B. Buckner.
1969 – The Cuyahoga River catches fire, which spurs an avalanche of water pollution control activities and results in the Clean Water Act, the Great Lakes Water Quality Agreement, and the creation of the federal Environmental Protection Agency and the Ohio Environmental Protection Agency.

On this day for the United States

Events

1844 – Influential North American fraternity Delta Kappa Epsilon is founded at Yale University.
1898 – Spanish–American War: United States Marines land in Cuba.
1918 – Hammond Circus Train Wreck kills 86 and injures 127 near Hammond, Indiana.
1969 – The Cuyahoga River caught fire, which triggered a crack-down on pollution in the river.