The purpose of laying wire was to avoid dependance on radio, and vulnerability to interception and direction finding, not to enable radio.
Yes, oddly, the forward elements of major attacks were occasionally Signal Corps laying wire, Military Police posting route control signs, and engineers improving roads or clearing obstacles. That was after reconnaissance units, who often bypassed resistance.
Dad was “D-Day +45”, and in with Patton’s 3rd, in Army Corps of Engineers, 101st, 26th Infantry, “Yankee Division”, combat engineer on the tip of the spear, thru Battle of The Bulge, and was shot by Nazi sniper while rescuing fellow wounded Engineers under fire. He was evac’d to UK and US; Silver & Bronze Stars, Purple Heart. He still hates the cold to this day. He’s 88 and could probably kick my butt, at 62. Heh.
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