Load-Bearing Equipment (LBE), such as the US ALICE or MOLLE II harness, predates the modern plate carrier. LBE consists of a belt and suspenders system that holds ammunition, water, and other gear. Its usage scenario was for infantry who did not routinely wear body armor. It distributed weight well and kept gear accessible.
The plate carrier evolved with the widespread adoption of body armor. It integrated the load-bearing function directly onto the armor platform itself via PALS/MOLLE webbing. This kept the weight centralized and made donning and doffing faster.
The efficacy of both is carrying essential combat load. The plate carrier represents an evolution driven by the modern necessity of wearing armor. However, some units still use LBE for certain light infantry or reconnaissance roles where armor is not constantly worn, valuing its weight distribution and cooler wear. The choice reflects the operational environment and threat level.
