We all know that walkers are useless militarily as Star Wars so kindly showed us in Episode 5 of the Skywalker saga. However what I have noticed is that planes can only fly if there's an atmosphere to hold them up, but if there isn't one, then what other options could people use to try and take walkers down?
Now what I am working on is a scenario where there is a war engulfing most of the Earth and Moon; so though this question applies to anywhere with little to no atmosphere I am specifically asking about the Moon.
What I have thought of is that the Walker (which would be massive) are artillery platforms, troop transports etc., think of them as a battleship equivalent. They're obviously vulnerable to something to small to easily shoot. This is why there are smaller walkers around to protect it. There are also infantry to be a more versatile defense and offense. What is wrong with this?
I'm partly relying on tanks tumbling over too much on the Moon because of their speed. So if you actually slowed them down to a speed where they could gain traction. that a well made Walker could easily surpass them. Also is there any point in having infantry (in suits oc) as an integral part of these Walker groups?
(Also a lunar faction attacks Earth with a walker group. And we all know how that will turn out.)