Man runs 10,000 meters in less than 30 minutes:
Finnish runner, Taisto Mäki, broke his previous record by running the distance in 29 minutes 52 seconds.

Japan defeats China in the Battle of the Yalu River:
Also known as the Battle of the Yellow Sea, the conflict was fought between Japan and China during the First Sino-Japanese War.

Bloodiest Single Day of the American Civil War takes place:
The Battle of Antietam was fought near the Antietam Creek in Sharpsburg, Maryland. At least 4000 soldiers on both sides died.