Step 1 : Introduction to the question "What makes the state flag of Oregon unique among all U.S. state flags?"
Oregon’s state flag is unique because it is the only U.S. state flag with different designs on the front and back sides. The front side prominently features the state seal and the words “State of Oregon” along with the year 1859, when Oregon officially became a state. The reverse side displays a golden beaver, the official state animal and a longtime symbol of Oregon’s early fur trade economy. Most state flags use the same design on both sides, making Oregon’s distinctive double-sided flag especially unusual and highly recognizable in American vexillology.