FSNB, History
The following are major historical events for FSNB, including mergers and acquisitions.
| 1946-07-01 | Institution established: Original name:The Fort Sill National Bank | |
| 1984-11-05 | Change trust powers from TRUST POWERS NOT GRANTED to FULL TRUST POWERS GRANTED | |
| 2015-07-24 | Changed name to FSNB, National Association | |
| 2015-07-24 | Moved bank headquarters from FORT SILL, OK to LAWTON, OK |