Army - The mission of the Army Component is to provide trained soldiers for Defense Support to Civil Authorities (DSCA), support the Texas Army National Guard, and non-governmental organizations (NGO).

Air - The mission of the Air Wings is to provide mission-capable airmen as a force multiplier for the Texas Air National Guard and for other missions in support of homeland security through Defense Support to Civil Authorities (DSCA).

Maritime - The mission of the Texas Maritime Regiment (TMR) is to provide highly trained military personnel for Defense Support to Civil Authorities (DSCA), for operations in the maritime, littoral, and riverine environments in support of homeland defense and in response to man-made or natural disasters.

Medical - The mission of the Texas Medical Brigade (TMB) is to augment health and medical support in times of need. TMB maintains a highly trained force that is rapidly deployable to provide appropriately qualified Health, Medical and Support personnel in accordance with the Defense Support of Civil Authorities (DSCA) missions.

Operation Strong Safety
Department of Defense Interface Communications Exercise (DICE)
Operation Lone Star
Operation Border Star
Oral Rabies Vaccination Program
Support to State Operations Center (SOC)
Support to Texas National Guard
Support to Texas Air National Guard
Support to TMD Muster Day
Military Ceremonies & Funeral Support
Community Service Support
Hurricane Harvey (2017)
Operation Alamo Shield (2014)
Hurricane Ike (2008)
Hurricane Gustav (2008)
Hurricane Dolly (2008)
Hurricane Dean (2007)
Lake Leon Flood (2007)
Marble Falls Flood (2007)
Operation Wrangler (2006)
Hurricane Rita (2005)
Hurricane Katrina (2005)
Hurricane Ivan (2005)
Space Shuttle Debris Recovery, Weatherford (2003)
and others dating back to 1943