Army Combat engineers! Who are they? What do they do? An Army Combat Engineer conducts mobility, counter-mobility and survivability in support of combat forces. But how did it all start? Watch to learn more! About the U.S. Army: The Army Mission – our purpose – remains constant: To deploy, fight and win our nation’s wars by providing ready, prompt & sustained land dominance by Army forces across the full spectrum of conflict as part of the joint force. | 412th Theater Engineer Command