The 'Grid Square Removal System' that redefined modern artillery

Wars & Conflicts · Published 16 October 2026 Swipe more like this →

In short: In the 1970s, Soviet doctrine favored overwhelming the enemy with massive, truck-mounted rocket barrages. The US responded by creating a system that combined the mobility of an armored vehicle with the devastating reach of a rocket battery, capable of erasing entire target areas in under a minute.

The M270 Multiple Launch Rocket System (MLRS) was born from a strategic necessity to counter Soviet rocket superiority. While the US initially favored large-caliber artillery for its accuracy, the 1973 Yom Kippur War demonstrated that rocket artillery could effectively strike rear-area targets and surface-to-air missile sites. This shifted US doctrine toward a system that could provide high-volume counter-battery fire and engage air defenses, freeing up traditional cannons for direct ground support.

Developed as the General Support Rocket System (GSRS) starting in 1975, the M270 was a collaborative effort between the US, West Germany, France, and the UK. By 1979, it was redesignated as the MLRS. The system utilizes a lengthened Bradley Fighting Vehicle chassis (the M993) to carry the Launcher-Loader Module. A key design shift occurred during development: the original 8.3-inch rocket diameter was increased to 8.9 inches to accommodate the AT2 mine, a requirement from European allies.

The M270 is defined by 'shoot-and-scoot' tactics, designed to launch rockets and relocate immediately to avoid counter-battery fire. A single battery of nine launchers firing 108 rockets possesses the firepower of 33 battalions of cannon artillery. Its British nickname, the 'grid square removal system,' stems from its ability to blanket a single square kilometer with cluster munitions. While a typical salvo can drop over 23,000 submunitions, a 2% dud rate can leave roughly 400 unexploded bombs in the target area.

Technological evolution transformed the M270 from a 'blanket' weapon to a precision tool. In 2006, the introduction of the M31 GMLRS Unitary rocket added GPS guidance and a 200-pound high-explosive warhead, allowing for point-target strikes in urban environments with fewer munitions. Recent advancements by Lockheed Martin have pushed the extended-range GMLRS to a maximum of 93 miles (150 km), approved for production in May 2024.

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