noun
army; area corps
A military unit in the Japan Ground Self-Defense Force, roughly equivalent to an army or regional corps. Domain-specific term.
陸上自衛隊の方面隊は、全国を五つの区域に分けて配置されている。
The Ground Self-Defense Force's area corps are deployed across the country, divided into five regions.
旅団 is a brigade, a smaller unit than both 師団 and 方面隊.
Compound of 方面 (area, direction) and 隊 (corps, unit). The term is specific to the Japan Ground Self-Defense Force.