1885-1900 Western Federal Cavalry.

I am researching and documenting the life of my gg grandfather, General Robert EL Michie.

He spent a lot of time in the west. 
- Fort Boise 1885-1890. 
- ft Lowell AZ 1890-1891 (going to a museum in Tucson at the end of January- fingers crossed)

- ft wingate NM 1891-1884, 1897-1898

- ft Riley KS 1892-1897

- presidio of sante fe 1890

How /where can I find more info?