- Battle at Booneville Mississippi: Confederate superior power driven out
- Battle of Malvern Hill [Poindexter's Farm], day 7 of 7 days battles, Union forces repel Confederate attack, Tactical Union victory (US Civil War)
- Congress outlaws polygamy for the 1st time
- Emperor Alexander II grants Jews right to publish books
- The Russian State Library is founded.
- US Internal Revenue Law imposes 1st federal taxes on inheritance, tobacco & on incomes over $600 (progressive rate)
Day of the Week: Tuesday