TALLINN, ESTONIA • Advertisements promise cash bonuses and enticing benefits. Recruiters are making cold calls to eligible men. Enlistment offices are working with universities and social service agencies to lure students and the unemployed.

A new campaign is underway this spring across Russia, seeking recruits to replenish its troops for the war in Ukraine.

As fighting grinds on in Ukrainian battlegrounds like Bakhmut and both sides prepare for counteroffensives that could cost even more lives, the Kremlin’s war machine badly needs new recruits.

A mobilization in September of 300,000 reservists — billed as a “partial” call-up — sent panic throughout the country, since most men under 65 are formally part of the reserve. Tens of thousands fled Russia rather than report to recruiting stations.

The Kremlin denies that another call-up is planned for what it calls its “special military operation” in Ukraine, now more than a year old.

But amid widespread uncertainty of whether such a move will eventually happen, the government is enticing men to volunteer, either at makeshift recruiting centers popping up in various regions, or with phone calls from enlistment officials. That way, it can “avoid declaring a formal second mobilization wave” after the first one proved so unpopular, according to a recent report by the U.S.-based think tank Institute of the Study of War.

One Muscovite told The Associated Press that his employer, a state-funded organization, gathered up the military registration cards of all male employees of fighting age and said it would get them deferments. But he said the move still sent a wave of fear through him.

“It makes you nervous and scared — no one wants to all of a sudden end up in a war with a rifle in their hands,” said the resident, who spoke on condition of anonymity because he feared reprisal. “The special operation is somewhat dragging on, so any surprises from the Russian authorities can be expected.”