Throughout the course of the long war in Afghanistan, Coalition troops have relied on thousands of military working dogs to help keep them safe, and make their jobs easier. The dogs are trained to detect explosives, to find illegal drugs, to search for missing comrades, or target enemy combatants. Not only are they active on the front lines, but behind the lines they serve as therapy dogs, service dogs, and loyal companions. They also share the same risks as the ground troops, suffering injuries and sometimes death on the battlefields. Gathered here are images of these dogs and their handlers in Afghanistan and back home, from over the past several years, part of the ongoing series here on Afghanistan.

Disabled dogs outfitted with wheelchairs walk at an animal rescue center on July 12, 2008 in Chengdu of Sichuan Province, China. The center has adopted over 100 stray dogs and cats from quake-struck areas. Those who were hurt or disabled are outfitted with a cart to help support they're body and make them mobile. (Photo by China Photos/Getty Images)

A Yorkshire Terrier has it's hair done on a grooming table on Day one of Crufts at the Birmingham NEC Arena on March 8, 2012 in Birmingham, England. During the annual four-day competition nearly 22,000 dogs and their owners will compete in a variety of categories, ultimately seeking the coveted prize of “Best In Show”. (Photo by Dan Kitwood/Getty Images)

Crufts is among the largest dog events worldwide. It was first held more than a century ago in 1891. Since then it has grown into more than just a dog show, but an event that celebrates the role that dogs play in our everyday lives. It is unimaginable how much this show has changed since the first time it was set up by Charles Cruft. Even though this event was very different back then, Charles Cruft would surely enjoy the scope and size of the modern Crufts show. The core event of the show is of course the dog show, which celebrates the unique relationship between dogs and their owners.

A musher races with his dogs during a sled dog European Championship in Venek November 22, 2014. (Photo by Laszlo Balogh/Reuters)

Paisley, a standard poodle, is pictured at Intergroom in N.J., March 2014. Intergroom is one of the largest cats and dogs grooming conferences in America. (Photo by Paul Nathan/Rex Features)

The more representative dogs from every country photographed wearing the uniform of their football national team for Life on White