If those two squads belong to the same alliance they will help each other fight and that will be in the end of it.

If two squads are from different alliances they will fight what's on the colony then fight each other after it

What if thos squads are not from the same alliance and have 1 Inf armour in them then who will win?

ok here's the thing

if more than 1 alliance attack a guy, first they will join and attack the defender

then the alliances that has the least units will have to turn, leaving 2 alliances who have the most units behind

then these two alliances will attack each other, the winner get the OP, conquer, watever on that place.

if one alliance is attacking, they help eachother as one, if they are from differant alliances or no alliance they will attack eachother and a normal battle will take place if they kill the colony/op units b4 hand if they dont they will die what i am saying is they kill the defender first b4 eachother