Sgt. Phillip Baca, an infantry squad leader with 3rd Battalion, 3rd Marine Regiment and a Barstow, Calif., native, writhes in agony as a cramp grips his leg and he works to straighten it out while low crawling along Fort Hase Beach aboard Marine Corps Base Hawaii during Sergeants Course Aug. 19, 2015. Baca, along with other sergeants in the course, low crawled in a tricky scenario where they were outnumbered four to one, and needed to repair a broken down vehicle. Sergeants Course is a vital part of professional military education for any Marine and helps to maintain the standards amongst the NCOs of the Marine Corps. The course supports MCB Hawaii’s mission, which is to provide facilities, programs and services in direct support of units, individuals and families to enhance and sustain combat readiness for all operating forces and tenant organizations aboard the installation.