Spoiler alert: In "The Expanse" all of the above happens... Another reason why ground-level fighting on Earth is stupid for the Martians is that Earth has like

Spoiler alert: In "The Expanse" all of the above happens... Another reason why ground-level fighting on Earth is stupid for the Martians is that Earth has like 20 Billion inhabitants at that point, and Mars has "only" 5 Billion, and of course a lot less marines. Though I have to say that most Sci-Fi universes, the Expanse being no exception, are overly optimistic about population growth, and they must have shipped at least hundreds of Millions of colonists to Mars to achieve the stated population. Earth alone will probably not reach above 11 Billion Humans.