For no reason, a short primer on DPICM ("Steel Rain"), the U.S.' main tube artillery cluster submunition.
M42/M46 DPICM is a small, shaped charge warhead meant to defeat both armor and personnel across a wide area.
The two primary 155mm DPICM rounds are M483A1 (88 individual submunitions, shorter range) and M864 (72 individual submunitions, basebleed for greater range).
Here is Echo Battery, 2nd Battalion, 11th Marines shooting 155mm DPICM during Summer Firex '18.
GMLRS DPICM for HIMARS and M270 is a bit of a different story.
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