All war dogs start out as puppies. This little guy started his training at the Military Working Dog Breeding Program at Lackland Air Force Base in San Antonio. 

Source: DoD Linda Hosek

Source: DoD Linda Hosek

They go through extensive training to prepare them to find explosives and to deal with bad guys on the battlefield.

Source: US Marine Corps. Photo by Staff Sgt. Robert Storm

Source: US Marine Corps. Photo by Staff Sgt. Robert Storm

Source: US Air Force. Photo by Master Sgt. Cecilio Ricardo.

Source: US Air Force. Photo by Master Sgt. Cecilio Ricardo.

They grow very close to their trainers.

Source: US Air Force. Photo by Senior Airman Gina Chiaverotti-Paige.

Source: US Air Force. Photo by Senior Airman Gina Chiaverotti-Paige.

Source: US Air Force. Photo by Airman 1st Class Allen Stokes.

Source: US Air Force. Photo by Airman 1st Class Allen Stokes.

They wear shades called Doggles to protect their eyes while they work. 

Source: US Army. Photo by Pfc. William Servinski II.

Source: US Army. Photo by Pfc. William Servinski II.

Source: US Air Force. Photo by Senior Airman Elizabeth Rissmiller.

Source: US Air Force. Photo by Senior Airman Elizabeth Rissmiller.

War Dogs go with Special Forces and do everything they do: night raids, water insertions, and skydiving. 

Source: US Army

Source: US Army

Source: U.S. Air Force. Photo by Tech. Sgt. Manuel J. Martinez.

Source: U.S. Air Force. Photo by Tech. Sgt. Manuel J. Martinez.

Source: US Navy

Source: US Navy

Many War Dogs are adopted by their handler when their service is completed. 

Source: US Air Force. Photo by Staff Sgt Stan Parker.

Source: US Air Force. Photo by Staff Sgt Stan Parker.