1. Oregon statehood: On March 12, 1859, Oregon became the 33rd state in the United States of America, after Congress approved its statehood earlier in the same year. As a result, March 12 is celebrated annually as Oregon's Statehood Day.

2. Native American treaties: March 12, 1851, marks the signing of the Middle Oregon Treaty by U.S. officials and representatives of several Native American tribes in Oregon, including the Kalapuya, Molalla, Santiam, and Yamhill. The treaty established peace and set boundaries between the tribes and the U.S. government.

3. Lee Moorhouse: Lee Moorhouse was a well-known photographer who documented life in early 20th century Oregon through his photographs. On March 12, 1905, President Theodore Roosevelt received a portfolio of Moorhouse's photographs of Oregon for his personal collection.

4. Portland Women's Forum State Scenic Viewpoint: This scenic viewpoint, located on the Historic Columbia River Highway near Corbett, Oregon, was created on March 12, 1937, as a tribute to the women who lobbied for its creation. The Portland Women's Forum was a group of civic-minded women who fought for the preservation of the Columbia River Gorge.

5. Oregon Shakespeare Festival: On March 12, 1935, the first Oregon Shakespeare Festival was held in Ashland, Oregon. The festival, which began as a three-day event, has grown into a world-renowned theater festival that showcases Shakespearean plays and contemporary works.