Welcome
Welcome to the official website of Maritime Expeditionary Security Group (MESG) 1! MESG-1 is an Echelon IV command that oversees the West Coast Maritime Expeditionary Security Squadrons (MSRONs) and a training and evaluation unit. The MESF deploys globally and operates throughout the sea-to-shore and inland operating environment protecting maritime infrastructure, providing insertion and extraction capabilities and supporting Fleet assets in support of maritime operations.