Nah, it's sorta like my post.

He speaks a lot of the enemies from his timeline, since the troops haven't realized the shift yet, so naturally they think the border is as it was.

Hence why i speak of the "Commonwealth alliance" which i imagine are made up from mainly brits, an america where the confederacy won and texas along with their south european allies.
All while i sail towards southern africa, thinking its ruled by some backwater tribal government with no chance of resisting a battleship. While it is actually the republic of south africa i'm headed for.
Whom probably have a bit more juice behind them.

All in all, everyone will be rather confused :P Especially our "characters".