The Islamic Republic has in total about 180,000 people in the Sepah, and they've sent some of them to Ukraine. Russia hasn't asked the (Lebanese) Hizballah or Hashd al-shaabi (an Iraqi militia) to send forces because (Chechen leader) Ramzan Kadyrov has a problem with them both. The Iranian forces currently in Russia won't be coming back until the state of Ukraine is clarified. Some of them have been killed in Ukraine. They may send more guardsmen to Russia. First they'd sent Russia missiles and drones. Then they sent them... advisors. Then they gathered members of the Guards from across the country and sent them to the Ukraine war. My father told my mother they are on the western front, and some are based in Russian-occupied regions in Ukraine.