On our way back from Texas (dropping Matthew at Holy Trinity Seminary at UD) we stopped at Vicksburg, MS. The campaign to take Vicksburg lasted almost 2 months. There is a National Military Park at the site of the battle. There are numerous (and I mean numerous) memorials for every Union regiment and company which took part in the battle. There are NO Confederate memorials in the park. All the casualties there were Americans.
The remains of the Union metal-clad Cairo is at the park and was very interesting.
Oremus pro invicem!