Various sources are reporting that the Russian missile cruiser Moskva, flagship of the Russian Black Sea fleet, has sunk after being hit by Ukrainian missiles. Some speculate there may have been nuclear warheads on board when she sank. This is a big setback for Russian hopes.
Various unmanned devices like drones, cruise missiles, etc. as well as antitank rockets, have been making combat life for manned vehicles (tanks, ships, trucks) "nasty, brutish, and short," to quote Thomas Hobbes. We saw this in the brief war Armenia lost to Azerbaijan and we see it now in Ukraine.
Technology is again changing the nature of warfare, something that has happened many times in the past. We live in interesting times....