Fort Laramie was a significant 19th century trading post and diplomatic site located in the U.S. state of Wyoming. During the middle 19th century, it was a primary stopping point on the Oregon Trail and the Mormon Trail and was, along with Bent's Fort on the Arkansas River, the most significant economic hub of commerce in the region. In the 1840s it was taken over by the United States Army to protect travelers on the Oregon, California and Mormon trails. Today, the remaining structures are preserved as the Fort Laramie National Historic Site by the National Park Service.