Gaines Mill is for me a fascinating battle and one that I have been hoping to play for sometime. It has been made even more interesting by my recent visit to the battlefield.
It of course is set against the Peninsula Campaign and the Union advance on Richmond. With Lee taking the field the Confederate forces undertook a series of troop movements and battles that unhinged the Union forces arrayed in front of the Rebel capital. Gaines Mill, fought on the 27th of June found Lee launching the largest Confederate attack of the war, with some 57,000 men in six divisions. In the early afternoon, A.P. Hill ran into strong Union forces deployed along Boatswain’s Creek. This swampy stream, slopes and hasty defences provided a major obstacle.
The resulting attacks resulted an intense battle, the largest of the Seven Days and the only clear-cut Confederate tactical victory of the Peninsula Campaign. While McClellan had already planned to shift his supply base to the James River, his defeat unnerved him and he abandoned his advance on Richmond. This scenario was created by Andy Nicoll and Jim Nevling and can be found here.
For those interested my visit to the battlefield is documented here. For additional reading I would highly recommend Stephen Sears “To the Gates of Richmond” which describes the battle well and places it in the context of the Peninsula Campaign.