1. In 1862, during the American Civil War, the Battle of Cedar Mountain was fought in Culpeper County, Virginia. A significant number of soldiers from Washington State fought in this battle as part of the Union Army.

2. In 1914, Washington State became the first state in the U.S. to create a minimum wage law for women and minors. The law was signed by Governor Ernest Lister on July 28, 1913, and went into effect on July 28, 1914.

3. On July 28, 1952, the U.S. Army Corps of Engineers completed the construction of the Chief Joseph Dam on the Columbia River near Bridgeport, Washington. The dam is one of the largest hydroelectric dams in the country and provides power for a large portion of the Pacific Northwest.

4. In 1962, the Seattle World's Fair officially closed after a six-month run. The fair, which ran from April 21 to October 21, 1962, was a major event for the city, attracting over 10 million visitors from around the world.

5. On July 28, 1982, the Space Shuttle Columbia landed at Edwards Air Force Base in California, completing its fourth mission in space. The mission, which began on July 29, 1982, was the first shuttle mission to deploy a satellite into orbit. Several astronauts from Washington State have flown on space shuttle missions over the years.