Mississippi
There is no Border between Britain and Spain. Britain is an island.
The Rio Grande ( Rio means river in spanish) is the border between Mexico and Texas.
The Ohio river
The Red River
the britts and the dutch South Carolina and Georga.
The Mississippi River helped form the boundary between British and Spanish territory in 1763.
Mississippi was the border to the British territory.
Columbia river
the river that forms the border between India and Kentucky is the Mississippi River.
The Missouri River forms the border between Iowa and Nebraska.
The Colorado River forms the border between Arizona and California.The Colorado River.