Because their fathers knew how to handle them and wanted to pass this knowledge to their sons? Or bc they believed that their sons needed this knowledge to succeed in life? Or that it was common to do so and their fathers taught them it so they wanted to continue this tradition? Idk bro
They attacked only at night under the cover of darkness. Their tactic was to engage in small skirmishes in the South Vietnamese countryside where they were familiar with the area. They used guerilla warfare and had their trip wires and pits with sharpened bamboo stakes to demobilize the enemy. After the battle, they escaped back to the jungle.