With the completion of Fort Fetterman, Fort Caspar was abandoned and its garrison moved into the new fort in August.

The route left the Oregon Trail at Red Buttes, near Fort Caspar in central Wyoming, and headed in a northwestern direction.

Guinard also built a trading post at one end of the bridge which eventually became Fort Caspar.

Fort Caspar was partially reconstructed in 1936 using sketches made by Lieutenant Collins in 1863.

The city was established east of the former site of Fort Caspar, which was built during the mid-19th century mass migration of land seekers along the Oregon, California and Mormon trails.

Three months later the garrison was renamed Fort Caspar after Lieutenant Collins.

In 1867, the troops were ordered to abandon Fort Caspar in favor of Fort Fetterman downstream on the North Platte along the Bozeman Trail.

The town was named for nearby Fort Caspar which was an important stop on the Oregon Trail.

They sought revenge on settlers throughout the Platte valley, including an 1865 attack on what became Fort Caspar, Wyoming.

Fort Caspar (1866 - 1867)