Navy SEALS dog Cairo's involvement in the raid on Osama bin Laden has raised interest in military dogs

Animals have always had a place in military conflicts, whether by accident or design.

In the image above, Canadian soldiers walk with their dog as they arrive at a base near the village of Nakhonay in Panjwai district, southern Afghanistan.

In this photo: A German Bundeswehr army soldier with the Delta platoon of the 2nd paratroop company 373 strokes a dog on its head during a mission in the city of Iman Sahib, north of Kunduz, northern Afghanistan, December 6, 2010.