Seeking military exit from Fort Mason Texas in 1800’s and route traveled when they left

Seeking military exit from Fort Mason Texas in 1800’s and route traveled when they left.

I believe US 2nd Calvary exited Fort Mason prior to civil war and traveled to Indianapolis in mid 1800’s.  Route used (I believe) was through Texas Hill Country, the San Antonio.  

any journal/diary information from officers from these travels?