Marine Trenchers are elite veteran specialists within the Agurtan 303rd Marine Division, built for the high-stakes grind of the ""Deep Zones."" In tactical terms, a ""Deep Zone"" is shorthand for the low-lying ruins and industrial pits where gravity-heavy acid fog pools into a permanent, lethal toxic haze. These guys are the 303rd’s ultimate survivors. Their records run the gamut: from holding the line in mud-caked, gas-choked trenches during grim standoffs, to pulling off stealthy search-and-recon missions in the heart of radioactive jungles and wastelands. If a mission involves breathing poison and staring into the abyss, the Trenchers are the ones getting it done.