Which ranges are these from.
I noted the Imex scenery but the Calvary and apaches?
Is there a Custer and Gatling Guns/Artillery in the Calvary Range?
Foot Apaches are from Galloping Major.
Mounted apache is from Dixon and in a Perrys horse (ACW range)
Cavalry are from Foundry.
You can find a gatling gun in Artizan Designs range of Old West with a us infantry soldier and another in Gringo 40´s with a mexican revolutionaire.
Artillery i think you can use the ACW ones if i´m not mistaken though it depends on the period you want.