The best way to describe Oceania's physical geography is that Oceania is isolated from the rest of the world.
C, had large slave populations
The Peninsula(Peninsular) Campaign lead to the fall of the Confederate Capital.
A few things that are similar are first they both trade things, there both powerful countries and yes there both lands in Africa ;). A few differences are the physical land, the culture government, the people, a lot of others things I'm sure if you put your mind to it you can figure out.