From DYOS Wiki
Not to be confused with Montezuma

Montezilla (or Montyzilla) looks just like Montezuma, but his behaviour is an extreme version of his from Civilization IV. He likes to threaten people with a swarm of axemen if they do not do as he says, such as pay him tribute, which he normally demands.

Of course, when everyone has tanks, his gazillion axeman threats are quite empty...