Following high school, he enlisted in the United States Marine Corps and served until 2004.

Caldwell decided to serve his country and enlisted in the United States Marine Corps.

That same year, he enlisted in the United States Marine Corps.

He enlisted in the United States Marine Corps on 6 January 1942.

He enlisted in the United States Marine Corps in 1943.

At age 31, he enlisted in the United States Marine Corps on March 28, 1898.

After high school, he enlisted in the United States Marine Corps.

After graduation, he enlisted in the United States Marine Corps.

Although too old to be drafted, he enlisted in the United States Marine Corps.

Guillen enlisted in the United States Marine Corps at the age of 18.