Herringbone Formation - Operation Cedar Falls

Operation Cedar Falls, January 1967
https://en.wikipedia.org/wiki/Operation_Cedar_Falls

Interesting link @BravoZulu whilst I was editing the tag to include operation cedar falls I found we already had the tag and it was linked to the following photo

SGT Ronald A. Payne (Atlanta, GA), Squad Leader, Co A, 1st BN, 5th Mech Inf, 25th Inf Div, checks a tunnel entrance before entering it to search for Viet Cong and their equipment, during Operation "Cedar Falls" in the HoBo woods, 25 miles North of Saigon. Phot taken 24 January 1967.

Here is a tactical map of the Operation


Map of operation Cedar Falls, Viet-Nam War, january 1967.
Public Domain Image - By Department of the Army

South Vietnam, January, 1967: UH-1D helicopter extracts wounded soldiers from a landing zone carved out by Bravo Company, 4th Battalion, 503rd Parachute Infantry, 173rd Airborne Brigade during Operation Cedar Falls in the "Iron Triangle" near Saigon. More than 30,000 U.S. troops and several South Vietnamese infantry brigades took part in Cedar Falls, the largest assault of the war to that point.