About them lacking something or looking naked. Soldiers back then adorned themselves with tattoos called yantras, similar to this:
Not just soldiers wear tantras/yantras tattoos but ordinary people as well. They are believed to ward off evil and protect them in battle. Some Soldiers and King Jayavarman 7th, was tattooed from chin down to toe. He went to war almost naked, believing that the tat, was like an umpenetrable armor. Oh and most had long hair and in a bun.

"Yantra tattooing is a form of sacred tattooing practiced by Buddhist monks in Cambodia. The script used for Yant designs is ancient Khmer and Pali. Cambodians believe a yantra has magical powers that ward off evil and hardship. The master guarantees that no harm will come to the person who can faithfully keep the abstinence; not even a gun would fire and neither would a knife cut. The tattoo is particularly popular amongst monks and military personnel."