戦せん闘とう正しょう面めん幅はば

Meanings

1

noun

frontage; width of a battle front

Military term referring to the linear extent of a unit's front line or the width of a defensive position.

mask, face, features

幅hanging scroll, width

正しょう面めん
正面 means 'front' or 'front side' in general; 戦闘正面幅 specifically refers to the measured width of a combat front.
戦せん線せん
戦線 means 'battle line' or 'front line' as a broader concept; 戦闘正面幅 is a more technical term for the width of that line.

Compound of 戦闘 (sentō, 'battle') + 正面 (shōmen, 'front') + 幅 (haba, 'width').