Bottom line
Depending on your type and length of service, you may qualify for one or more VA education assistance programs. The two named here are the Montgomery GI Bill-Selected Reserve (MGIB-SR), tied to a six-year SMCR commitment, and the Post-9/11 GI Bill, tied to qualifying active-duty days under select activation authorities after 10 September 2001. The VA, not the Marine Corps, runs these programs, so the detailed eligibility lives on the VA website.
What it means for you
If you are in the SMCR and agree to serve at least six years, MGIB-SR is the benefit pointed at you. If you have served active-duty time under the right activation authorities since 10 September 2001, the Post-9/11 GI Bill may apply to you instead or as well. Which program fits, and how much you get, depends on your specific service. This section is a pointer, not a full eligibility guide. Confirm the details on the VA site before you count on a benefit.