The navy ship is a modified Lindberg model minesweeper. I used the turrets, bridge, and smoke stack from the land ironclad. The river boat is also from Lindberg. The original idea came from the original owner AQMF.
Remember, a bit to the North and west, on the Kansas Rive and near the Missouri River, is Ft. Riley, Kansas. This post was built to help protect the Oregon Trail and other trails headed West, and was an important training base for Cavalry until the Army stopped using Horses. I believe the 6th and 7th cavalry Divisions were stationed there. In AQMF terms, this might still be used to make Marvin's stay unwelcome.
Junction City Kansas was adjacent to Ft. Riley and an important river port.