The term 'Rocket Force' is a job description for a person who is responsible for providing THRUST to a rocket. This is typically done by controlling the engines and fuel supply of the rocket, allowing it to reach its desired speed and altitude. The crossword solution for this term is 'THRUST, ' which is a force that propels an object forward. THRUST is generated by the engines of a rocket, and is necessary for the rocket to reach its desired speed and altitude.