Service Dog Photos That Powerfully Capture The True Meaning Of 'Loyalty.'

Sgt. Mark Bush getting affectionately licked by his partner in crime, Xarius.

Soldiers in our country deserve to be treated with the utmost respect. They dedicate their lives to fight for our country. What a lot of people don't know, however, is that alongside some soldiers are soldier dogs.

Dogs have been used in warfare and on the battlefield for thousands of years. To this day, they're still used as trackers, scouts, sentries, and mine detection dogs. Around 5,000 military dogs served during the Vietnam War and have continued to be involved during all major conflicts.

Check out some of the photos below of the most loyal service dogs ever.

Now that's one wet lick I wouldn't mind getting on my face.