Since a recent HIMARS strike on an enemy ammunition depot in Izyum, located southeast of Ukraine’s second-largest city Kharkiv, Russian shelling has been “10 times less” than before, said Bohdan Dmytruk, a battalion commander in Ukraine’s 93rd Mechanized Brigade.

Yet the Biden administration has parceled out the rocket systems slowly, watching how the Ukrainians handle them — and how the Russians respond. To fighters on the ground, that makes little sense at a crucial moment in the war.

In his battalion alone, Dmytruk said, the number of killed and injured has fallen dramatically compared to when his soldiers moved to this part of the front line three months ago. “We have about one guy suffer a concussion every week now. Before the HIMARS hit, it was about two to three a day because of the intensity of the shelling.”

Dmytruk and soldiers in the area attributed the drop-off in what was near-constant bombardment to the Russians’ need to conserve shells after the depot was destroyed, and their fear that firing their own artillery will alert the far more accurate and agile HIMARS to their positions.