Biden’s son died of brain cancer. Specifically, according to PBS, Beau died from “glioblastoma multiforme, the most common form of brain cancer.

We must stop Biden from pretending that his son died in war. He uses that all the time to tear jerk the public. His son died of brain cancer. He did not die on the battlefield.

This is his legal name:Joseph Robinette Biden III("Beau" is name he went by)

His mother and his younger sister, Noami, were killed in an car accident on December 18, 1972. Hunter was in the car and had serious injuries.

In 2003, he joined the military, and as member of the Delaware Army National Guard and served as a Major in the Judge Advocate General's Corps.

He became Attorney General in 2006, but had his own private law firm in 2004-2006.

His National Guard unit went to Iraq in October 2008 to September 2009.

In 2010 he had a stroke and was observed for days in the hospital but in 2013 he was found to have cancer.

He had two children: Natalie and Hunter

Source: https://www.thefamouspeople.com/profiles/beau-biden-33381.php

" The Judge Advocate General's Corpsof the United States Army was initially composed of Army officers who are also lawyers and who provide legal services to the Army at all levels of command"

It takes other people besides lawyers now but all are legal field citizens.

"he Judge Advocate General is one of the few positions in the Army explicitly provided for by law in Title 10 of the United States Code, and which requires a distinct appointment. Officers who have already been appointed to another branch of the Army are administratively dismissed and simultaneously recommissioned anew as judge advocates, rather than merely transferring branches."

"Staff judge advocates advise commanders on the full range of legal matters encountered in government legal practice and provide advice on courts-martial as required by the Uniform Code of Military Justice. Subordinate judge advocates prosecute courts-martial, and others, assigned to the independent United States Army Trial Defense Service and United States Army Trial Judiciary, serve as defense counsel and judges."

When they are deployed in war they are part of the officer legal team. They are not soldiers or infantry. They handle legal issues.

Source: https://military.wikia.org/wiki/Judge_Advocate_General%27s_Corps,_United_States_Army