1. On September 19, 1846, the United States Army under General Stephen W. Kearny and the California Battalion under John C. Fremont successfully captured the town of Santa Fe, New Mexico, during the Mexican-American War. This conquest helped secure the Southwest for the United States, including what is now Oregon.

2. In 1862, Thomas Robbins and William Newell discovered gold in the Powder River Valley of northeastern Oregon. This led to a gold rush in the area, which brought thousands of miners and settlers to Oregon.

3. On September 19, 1882, the U.S. Postal Service issued the first postage stamp featuring an image of a Native American. The stamp depicted the famous Indian Chief Running Antelope of the Hunkpapa Sioux tribe, who played a prominent role in the Battle of Little Bighorn.

4. In 1934, the University of Oregon's Autzen Stadium was dedicated on September 19. The stadium, located in Eugene, Oregon, is home to the Oregon Ducks football team and is known for its unique architecture and noisy crowds.

5. On September 19, 1982, the Oregon Shakespeare Festival officially opened the New Theatre, a state-of-the-art facility designed to enhance the festival's staging of Shakespearean plays. Since then, the New Theatre has become a popular venue for many other types of performances, including concerts, ballets, and plays.