After Suffering Heavy Losses, Ukrainians Paused to Rethink Strategy

In the first two weeks of Ukraine’s grueling counteroffensive, as much as 20 percent of the weaponry it sent to the battlefield was damaged or destroyed, according to American and European officials. The toll includes some of the formidable Western fighting machines — tanks and armored personnel carriers — the Ukrainians were counting on to beat back the Russians.

The startling rate of losses dropped to about 10 percent in the ensuing weeks, the officials said, preserving more of the troops and machines needed for the major offensive push that the Ukrainians say is still to come.

Some of the improvement came because Ukraine changed tactics, focusing more on wearing down the Russian forces with artillery and long-range missiles than charging into enemy minefields and fire.