Curious what would happen if game tied

I just finished game where I could have won but gave up a little soon, then tried to recover but to late. Had already sent navy home. Bad move. But here was the final score in Historical Map.

Brazil 1820

South Africa 1760.

Could have easily taken 3 of Brazil's cities before days end.

So it would have been 1790 to 1790.

What would have been the rewards in that case?