Contingency contracting support is an integral part of the overall process used to provide supplies, services, and construction in support of Marine air-ground task force operations. Contingency contracting responsively, effectively, and legally obtains essential supplies, services, and construction unavailable through normal logistic channels by contracted logistic support agreements. Marine Corps Reference Publication (MCRP) 4-11E, Contingency Contracting, contains doctrine for commanders and their staff members to plan for and obtain contracting support when deployed and applies to all Marine Corps units across the full range of military operations, regardless of the size of the supported force, the complexity of the mission, or the mission location. It identifies the organizations and participants who provide contracting support when deployed, the organizations necessary for its responsive and effective use, and the procedures to obtain supplies and services through contracting support.