The BM-13 multiple rocket launchers can
simultaneously drop many hundreds of kilograms of
explosive over a wide area, at a range of over 9,000
yards, devastating to unwary infantry. One disadvantage
is they take longer to re-load than conventional
artillery, and are much less accurate if trying to
reduce strong points.

CCF BM-13 Multibarreled Rockets, effectively positioned
on a forward slope.
They have dug semi-caves behind their
deployed position, making them safe from all but a direct
hit. As positioned, they can enfillade support roads and
staging areas, and can emerge suddenly from their
protective holes to rain terror on any approaching
skirmisher units. This shows one reason why napalm
strikes by ground support aircraft were so feared. It
would spread over a wide area, suck the oxygen from the
caves, and kill everyone.
By 1953 China had built up her
artillery support all along the line until it
equalled our own in numbers. The barrages laid down
to isolate and overwhelm Combat Outposts under
attack near the war's close were frightful, equalling or exceeding
anything in World War I