Camouflage patterns.

From the BBC:

Working in Afghanistan, photographer Laura Lean noticed the wide variety of camouflage patterns used by members of the Nato-led International Security Assistance Force (Isaf) and set about capturing as many as she could.

"Each nation’s camouflage is unique," said Lean. "Despite the uniformity of their clothing, the camouflage fabric divides the soldiers that wear it into distinct groups. A lot of the designs have been formulated for the Afghan environment and yet the difference in patterns is extraordinary."

Click to go to the photo gallery.
I didn't even know some of these countries participated in ISAF.

Non-smoking, please.