2. Primitive Military Weaponry Was Still Effective in a Modern World
The US NATO forces were easily fooled by Serbian forces during the Kosovo conflict. While NATO was carrying out consistent airstrikes against the Serbian units in 1999, they believed they had destroyed a significant amount of tanks and decimated a majority of Serbian troops.
However, they were mistaken. The Serbian army resorted to using more primitive methods of attack to disguise their weaponry. They used milk cartons as missile launchers, formed logs into artillery guns, and created substantial bridge-like formations from basic plastic sheeting.
By the end of the attacks, the Serbian army were still mostly intact, fooling the US entirely.