1. In 1842, the Webster-Ashburton Treaty was signed, resolving the boundary dispute between Maine and Canada. The treaty was negotiated by U.S. Secretary of State Daniel Webster and British Ambassador Alexander Baring, 1st Baron Ashburton.

2. In 1854, the first territorial legislature of Washington Territory (which included present-day Washington, Idaho, and parts of Montana and Wyoming) convened in Olympia. The first governor, Isaac Stevens, had been appointed earlier that year by President Franklin Pierce.

3. In 1929, Spokane's Fox theater opened its doors. The elaborate movie palace was designed by architect Robert Reamer, who also designed the Old Faithful Inn in Yellowstone National Park.

4. In 1971, an earthquake in the Pacific Ocean off the coast of Washington generated a tsunami that caused damage in several coastal communities. The highest waves, measuring up to 30 feet, hit the town of Westport.

5. In 2014, Washington State University researcher Dorrie Main published a paper identifying the gene responsible for producing the first red-fleshed apples. The discovery could lead to the development of new apple varieties with improved health benefits.