Wikipedia:Selected anniversaries/July 21
July 21: National holiday of Belgium
- 1298 - English and Irish forces led by Edward Longshanks defeated William Wallace's Scottish troops at the Battle of Falkirk.
- 1831 - In Brussels, Leopold I (pictured) was inaugurated as the first King of the Belgians.
- 1861 - The First Battle of Bull Run, the first major battle in the American Civil War, began.
- 1954 - First Indochina War: The Vietnamese Demilitarized Zone was established at the Geneva Conference, partitioning Vietnam along the 17th parallel into North Vietnam led by Ho Chi Minh and South Vietnam under Emperor Bảo Đại.
- 1970 - The Aswan High Dam in Egypt was completed after 11 years of construction.