1 the U.S...
The UK uses the predecessor to US Customary called 'Imperial' - most of which is identical apart from volume measures.
1. The US IS a country. It does not have countries in it.
Most Countries other then the US Boxing is apart of the school curriculum. Puerto Rico, Philipines and many many more. The US is the least supporting when it comes down to overall support with the exception of the fans.
None is. The two countries are thousands of miles apart, and there is no overlap whatsoever.
Over 50 countries
They have troops in 135 countries
one
a lot
I cannot think of any apart from the fact both countries have suffered a civil war.
There is no such continent known as the US, the US is a country.
2000
Hawaii is a US State and contains no countries.