THUNDERCATS 2011 - THE LIZARDS' HEEL-FACE TURN

 This happens in Episode 14, "New Alliances," where the Lizard Mooks who "fight for treasure" desert the evil army en masse to return with their families because Even Mooks Have Loved Ones (compare the Fire Nation soldier in "The Southern Raiders"). This prompts Mumm-Ra, the Big Bad, to recruit generals who "fight for blood" (instead of treasure), ie ruthless psycho killers Kaynar (who was being shipped into solitary confinement) and Addicus (who was being executed), both of whom committed war crimes that were even too vile for Mumm-Ra's taste.

This contrast between Mooks with loved ones and psychos without loved ones, between fighting for treasure and fighting for blood, impressed me quite as a teen, in Thundercats 2011 and similar war/fantasy stories of that decade (like A:tLA) and, along with my obsession with the Vasas, led to my 30 Years' War phase and to the Ringstetten Saga...

TV TROPES:

Why is the Lizard Army now so easy to defeat?Also, it's pretty easy to get a huge army together by promising them the loot of their enemies. Once said enemies are defeated and the loot is taken? Not so easy when the Lizards explicitly state that they have families and children to return back to!

In "New Alliances" it appears that much of the Lizard army are conscripts. They may have been oppressed under the cats but under Mumm-Ra they're outright slaves. No wonder they take Lion-O's offer of mutual co-existence, it's the best deal they've ever had.