Pete Hegseth served in the military with active and reserve service spanning multiple periods: from 2003 to 2006, from 2010 to 2014, and from 2019 to 2021. He was commissioned as an infantry officer in the U.S. Army National Guard after graduating from Princeton University in 2003. His service included deployments to Guantanamo Bay, Iraq, and Afghanistan. Overall, adding these periods together, he served about 9 years in total in the military, with some intervals outside active service but still associated with the Individual Ready Reserve until he left in 2024.