could any of the kingdoms at middle earth attack the southern continents?

[tom the eldest]

Nah ,harad not included in the middle earth category.
Now,gondor did manage to push the southrons way to their homeland but they never go as far as far harad and the southern continent.if gondor can invade to the south,why they not push their advantage and invade the dark lands?the possibility is,a very large mumakil troops await them in far harad,and the gondorians then too afraid to attack them,knowing the risk.then they retreat.