Bebe Rexha attends the 61st Annual GRAMMY Awards at Staples Center on February 10, 2019 in Los Angeles, California. (Photo by Rich Fury/Getty Images for The Recording Academy)

American media personality Kim Kardashian seen on February 17, 2019 in Los Angeles, CA. (Photo by Hollywood To You/Star Max/GC Images)

Daniel Lismore arrives for the Brit Awards at the O2 Arena in London, Britain, February 20, 2019. (Photo by Peter Nicholls/Reuters)

Bella Hadid arrives at a Dior dinner party during the 72nd annual Cannes Film Festival at on May 15, 2019 in Cannes, France. (Photo by Pierre Suu/GC Images)

Cardi B attends the Fanatics Super Bowl Party at College Football Hall of Fame on February 2, 2019 in Atlanta, Georgia. (Photo by Shareif Ziyadat/WireImage)

Alexis Ren seen at Focus Features Los Angeles Special Screening of “Nocturnal Animals” at Hammer Museum on Friday, November 11, 2016, in Los Angeles. (Photo by Eric Charbonneau/Invision for Focus Features/AP Images)

Balinese girls in traditional costumes gather during a parade for this year's last sundown in Bali island, Indonesia Thursday, December 31, 2015. (Photo by Firdia Lisnawati/AP Photo)

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.