The U.S. Department of Veterans Affairs (VA), previously named the Veterans Administration, has been providing veterans educational assistance benefits, including GI Bill benefits, since 1944. In general, the benefits provide grant aid to eligible individuals enrolled in approved educational and training programs. The newest GI Bill was enacted on June 30, 2008, as the Post-9/11 Veterans' Educational Assistance Act of 2008 (Post-9/11 GI Bill), Title V of the Supplemental Appropriations Act, 2008 (P.L. 110-252). Although VA still provides benefits under several older GI Bills, the Post-9/11 GI Bill has represented more than 70% of total GI Bill participation and more than 80% of spending in each year since FY2013. In FY2021, the program is estimated to benefit over 700,000 individuals and expend almost $12 billion. This report provides a detailed description of the Post-9/11 GI Bill. The first section describes participant eligibility criteria. The second section indicates a participant's entitlement to benefits and the period during which the benefits must be used. The third section describes the eligible programs of education. The subsequent section explains the eligible benefit payments. The final sections illustrate key links to other programs administered by the U.S. Department of Veterans Affairs and current data on obligations and participation.