the.com/home front

means The civilian side of a nation at war — the factories, kitchens, and neighborhoods where ordinary people keep the war effort running.

from A coinage from the era of total war, when the 'front' (the military front line, itself from the literal sense of the forward-facing part of an army) got a domestic twin. The phrase spread widely during the First World War as governments realized that munitions output, morale, and food supply were as decisive as any battlefield — so the kitchen table became a front of its own.