Besides the Dept. of Veterans Affairs (VA), many U.S. Government agencies produce information on veterans and veterans affairs. Examples include:
Federal laws and regulations
United States Code Title 38 and parts of Title 42 (Text of U.S. laws once codified)
Public Laws (1995-present). Text of laws as passed by Congress and signed by the President) e.g. Public Law 114-2 Clay Hunt Suicide Prevention for American Veterans Act (2015)
Code of Federal Regulations (CFR). Title 38 Text of regulations federal agencies use to enforce laws.
Federal Register (1994-present) Lists proposed and newly adopted federal agency regulations
List of Sections Affected (LSA) Tracks changes in federal regulations between their publication in the Federal Register and CFR.
Regulations.gov Comment on proposed federal agency regulations and see public comments on these proposed regulations
Agency Information Resources
Tricare (military health care)
Indiana State Resources
Indiana Code (Titles 4, 10 etc.) Text of Indiana State laws
Indiana Administrative Code (Title 915) Regulations covering the Indiana Dept. of Veterans Affairs.