Military operations is a concept and application of military science that involves planning the operations for the projected maneuvering forces' provisions, services, training, and administrative functions—to allow them to commence, insert, then egress from combat.
The operations staff plays a major role in the projection of military forces in any wide spectrum of conflict; terrestrial, aerial, or naval warfare needed to achieve operational objectives in a theater of war.
The general staff of military operations deals with the planning, process, collection, and analyzing of information.
Its major function is responsible in the allocating of resources and determining time requirements.
J-3 (Joint (Multi-Service) Military Operations), G-3/S-3 (Army and Marine Corps staffs use both, depending on the organizational size and structure), N-3 (Navy), and A-3 (Air Force).