Dr. Biden arrived Friday morning and toured the Infantry Immersion Trainer and the Explosive Ordnance Disposal facilities, where new Marines learn how to patrol Afghan villages and interact with civilians but be on guard for insurgents.
The visit was part of the Joining Forces Initiative, Jill Biden's effort with first lady Michelle Obama to encourage public support of military personnel and their families.
The vice president joined his wife later at the Wounded Warrior Battalion-West facility, to meet with injured Marines and their family members.
Biden said he and his wife visit service members and their families at every chance they get in order to say "thank you."
"We only have one sacred obligation in the government," he said. "We have a lot of obligations -- to the old, to the young, to educate -- but we have only one sacred obligation and that is to equip those we send to war and care for those we bring home from war."
Before his stop at Camp Pendleton, the vice president spoke at a fundraising breakfast at the Beverly Wilshire hotel in Los Angeles.