Russia has sent so many men to join its war in Ukraine that crime levels in the country fell soon after the invasion began. Now their return is starting to unleash a wave of crime.

Crimes committed by servicemen that aren’t linked to the war increased by more than 20% last year, according to data from Russia’s Supreme Court. While the overall numbers are still small and many returning servicemembers don’t go on to commit offenses, there was a jump in cases of violent crimes as well as theft and drug-related transgressions.

The figures exclude crimes involving tens of thousands of convicts released from jail to join the war under a program set up by the late Wagner mercenary group leader Yevgeny Prigozhin. Those who survived six months at the front were able to gain a pardon from President Vladimir Putin and return to Russia as free men.