Islamic jihad militants wearing leafy branches march in Palestine. Photo: ifeng.com

Soldiers paint face camouflage on each other in Melgar, Columbia on May 12, 2009. Photo: ifeng.com

A soldier in Congo wears a camo headdress on July 17, 2013. Photo: ifeng.com

Soldiers dressed in white uniforms march during a military parade in Teheran, Iran on April 18, 2010. Photo: IC - hexun.com

Soldiers in black uniforms march during a military parade in Teheran, Iran on April 18, 2010. Photo: IC - hexun.com

Nicaraguan soldiers wear foliage camouflage during a military exercise celebrating their army’s 29th anniversary in Leon on August 21, 2008. Photo: ifeng.com

A soldier in Ostrava, Czech Republic wears a headdress on September 20, 2014. Photo: IC - hexun.com

A German soldier wears a straw-covered helmet during a military exercise in Dusseldorf on January 9, 2001. Photo: ifeng.com

Russian soldiers wear snow camouflage during shooting exercises on February 22, 2011. Photo: IC - hexun.com

A German sniper is covered from head to toe with grass in Munster on June 15, 2009. Photo: IC - hexun.com

A young Hamas soldier covers his face with leaves during a demonstration in Gaza on January 27, 2015. Photo: IC - hexun.com

An Indian soldier completely covered in desert camouflage participates in a military exercise on December 5, 2011. Photo: ifeng.com

A man wears an Indian special forces camo suit during an international military defense exhibition in New Delhi on March 30, 2012. Photo: ifeng.com

A South Korean soldier wears a helmet topped with grass during a military exercise in Yeoju on March 16, 2007. Photo: ifeng.com

A Nicaraguan soldier dressed in camouflage hides in a tree on June 13, 2007. Photo: ifeng.com

Female Israeli soldiers with mud-covered faces and branches on their helmets crawl on the ground on March, 23, 2005. Photo: IC - hexun.com

A sniper dressed in camouflage appears during a military parade in Kuala Lumpur, Malaysia on August 31. Photo: IC - hexun.com

Female soldiers in Jakarta, Indonesia, dressed in camouflage line up to celebrate the 41st anniversary of their country’s elite units on March 4, 2002. Photo: ifeng.com

A Russian tank is covered with plants in South Ossetia on August 20, 2008. Photo: ifeng.com

A Panamanian officer wears camouflage during a war games exercise in El Salvador on June 16, 2011. Photo: ifeng.com