Gen. Valery Gerasimov, the architect of President Vladimir Putin’s invasion of Ukraine, took over the day-to-day running of Russia’s war effort this month by convincing his boss that his predecessor was too passive, U.S. and European officials say.

But Gerasimov’s turbocharged strategy is what led to Russia’s problems to begin with, and Moscow still does not have the troops, ammunition or equipment that military officials say it needs to mass the big offensive promised by the country’s senior military leader.

Since Gerasimov replaced Gen. Sergei Surovikin, who was in the job for three months, Russia’s military leadership has focused on tactical issues like whether troops should travel in civilian vehicles and the dangers of their cellphone use, Western officials say. But while those matters have certainly bedeviled service members, there is no evidence that the Russian military has begun to address its fundamental problems, like shortages of ammunition and well-trained troops, despite the musical chairs of generals, according to these officials.