Which is almost literally a tale as old as time. This sequence:

• invade another country to take their shit
• oops it’s not going so well
• hire mercenaries with no morals to wreck stuff
• don’t pay your mercenary bills and/or attack them for being too powerful
• the mercenaries sack your own cities

That’s not just modern times, and it’s not even just medieval times: I’m pretty sure at least one Assyrian king was deposed that way. People like Putin are doomed to repeat history, it’s their lot in life.