Terrain wrapping for RTS style camera

I want to create a terrain for RTS game that simulate the earth, similar to Supreme Commander. If players keep scrolling the camera in the same direction on the east-west axis, he or she will eventual come back to where they begin.How could I achieve that effect in UE4?

My terrain is relative small and does not have too many detail (as any typical 3d RTS/city building terrain). However, I need the AI to be able to navigate though those wrap, and multi-player capability is a big plus. Is there a solution for my problem? Any suggestion for where I should begin is also very helpful.