US Army Pfc. Joseph A. Marquez, 20, died following a "single-vehicle incident," according to a news release.
The Delaware native was a member of 2-2 Stryker Brigade Combat Team, 7th Infantry Division, at Joint Base Lewis-McChord.
PFC Marquez attended Sussex Tech High School and was an athlete, playing on the football and baseball teams under coach G.L. Jefferson.
"Joey was always a hard worker. It was one of those things that you knew he was always going to outwork everybody in the room," said Jefferson. "As an athlete, that was one of the things that we really admired about Joey."
His mother says he wanted to serve his country since he was a little boy.
"My dad is a retired master sergeant in the Army. My brother Michael served in the Army. My brother Jason is a police officer. Joey just respected them so much. He loved this country and he wanted to be a hero," said his mother, Kristen Giordano
The American flag flies outside of their Dover home where they remember Marquez for his love of sports and infectious personality.
"Joey is absolutely the American dream. He worked at a diner, played football and baseball, went into the Army. He could do no wrong, he did no wrong," said his sister, Alexis Marquez.
His mother says Marquez died doing what he loved. She reflected on her last conversation with him the night before the accident: "'Be safe, I love you.' And he said, 'I love you, mom. I'll talk to you tomorrow.'"
The 8th Squadron, 1st U.S. Cavalry posted on Facebook that PFC Marquez was known for his laughter and the light he spread everywhere he went.
"We knew him as a loving son and brother to his family, a faithful friend to his comrades, and a loyal Soldier to his nation. He was and is so loved, and already so missed," the post read.
"We are deeply saddened by the loss of Pfc. Marquez," said Lt. Col. Michael Filanowski, commander of 8th Squadron, 1st Cavalry Regiment. "Blackhawk Squadron sends its deepest condolences to his family and loved ones. Our prayers and thoughts are with them during this difficult time.
The two injured soldiers were taken to Yakima Memorial Hospital with minor injuries, and were treated and released, according to the news release.
The training center is a satellite installation of JBLM.
The cause of the incident is under investigation.
The-CNN-Wire and Associated Press contributed to this report.