The vigil, part of Homecoming Week events, is set to begin at 5 p.m. at the foot of Aztec Green, near the campus trolley station.
It will conclude with a war memorial ceremony Friday.
Retired Air Force Brigadier Gen. Robert Cardenas, who took part in the flight that broke the sound barrier in 1947, will be the featured speaker at Friday’s event. He also flew bombers during World War II, and was shot down on his 20th mission but eluded capture.
The Aztecs who made the ultimate sacrifice died during World War II and in Korea, Vietnam, Afghanistan and Iraq.
SDSU, located in a region with nearly 250,000 veterans, says it has around 3,000 students who are on active duty, veterans, reservists or dependents.
Homecoming events will continue Friday with a networking mixer for students and alumni, the annual Marshall Faulk Aztec for Life Homecoming Celebration, and Saturday with a nationally televised football game against undefeated and 15th-ranked Fresno State.