[Megan]: A German shepherd is a person who either looks after sheep in Germany or is a German who looks after sheep somewhere. My breed's real name translates as German Shepherd Dog - 3 words in the special noun, so 3 capital initials needed, with GSD for short.
[Gothamce..]: Why are you writing about non-existent critters that you call "german Shepard's"? And your "Belgian malinois" should be either "Belgian Shepherd Dog (Malinois" or "BSD Malinois".
Several breeds get used by the police, by the military, by the Customs Dept, depending on which specific need is most important.
But the GSD is the best all-rounder there is, and so it makes sense to use them for ALL tasks unless you can afford to train handlers to modify their methods to train a superb-at-just-ONE-task breed to do ONLY that task. This is the case with "airport baggage dogs", where it is important to detect contraband without scaring the innocent passengers, and so the checking is done by a smaller, non-threatening pooch EXCEPT when it is believed that the pers0n bringing the drugs or explosives in is a violent criminal/terrorist, in which case a GSD is brought in. It is also the case with Bloodhounds - they were developed/selected to scent-trail, not to hold a felon in place or protect their handler.
The first thing for you to realise is that the true GSD is a SHEEP HERDING breed - and those breeds have been selected for millennia to take responsibility and to want to PLEASE their human. (Ignore the KC-registered pets and most of the show-dog GSDs - they were NOT bred with the instincts a sheep-dog needs.)
That initiative & responsibility is vital to a PD handler - he doesn't always have the time (or breath!) to order the pooch as to what to do.
That willingness to please is ESSENTIAL in a military/police/security dog - the handler MUST be able to control the dog so that it doesn't attack an innocent bystander; must be able to call it off when the felon stops fighting.
Agility (to get over obstacles when chasing a felon) and small size (to get inside culverts and cars) allied with courage/determination "man-stopping power" and ease of grooming/cleaning make the GSD and BSD (the short coated varieties such as the Malinois) the best bets for almost all defence/police work.
All those traits are part of the International Standard of each breed:
because those breeds are required to patrol & protect the unfenced crops from the sheep and the sheep from any predators, in all weather conditions.
• 1943 · Chips, a GSD x Husky x Collie donated to the 3rd Infantry Division as a sentry dog by his New York master, served in 8 campaigns that took him through North Africa, Sicily, Italy, France and Germany. On 10 July, during the invasion of Sicily, his unit was pinned down by machine gun fire. Chips charged the post and, despite taking several bullets, mauled the occupants & forced their surrender. Dwight D Eisenhower met him & awarded him a Silver Star and a Purple Heart, making him the most-decorated war dog of WW2 (The army later withdrew them, scared of the awards insulting human soldiers or their families)
Although Huskies don't normally herd sheep, herding & guarding IS part of their job-description.
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"In GSDs" as of 1967