The Indiana State Archives has some information on line for Indiana National Guard members 1898-1940. (Thanks to Fern Eddy Schultz for the information and Pat Harris for the URL, and to the volunteers who did the underlying work.) The "digital archives" also includes institutional and other military records unique to Indiana. These databases are not browseable and not searchable by location. They do allow searching by beginnings, thus "Smi" will produce all surnames that begin with those letters. (Remember: if you find something good, there may be even better in the original source it came from. Check it out.)
The Indiana State Genealogical Society's ever-growing collection of databases (388 as of 12 September) has a new one for my home county of La Porte, taken from H.C. Chandler & Co.'s Railway Business Directory and Shippers Guide for the State of Indiana. Most of these databases are members-only and they're an increasingly good reason to join the state organization. They are searchable by name only, but if you are uncertain of the name a blank search will produce the entire list for browsing.