The 42d Expeditionary Combat Aviation Brigade (42 CAB) trains, mobilizes and deploys to a designated area of operations in order to conduct aviation combat, combat support, and combat service support operations in support of coalition or national objectives.

1. Federal mission: As directed, the 42d Expeditionary Combat Aviation Brigade provides military support to civil authorities (MSCA) and conducts support of homeland security (HLS).
2. State mission: The 42nd ECAB maintains a manned, trained and equipped force capable of providing emergency and non-emergency aviation support to protect life and property; to preserve peace, order, and public safety; and provide military support to civil authorities, local county or state authorities for disaster relief, civil disturbances and counter-terrorism.