How did fighting between france and britain in europe and the caribbean the american cause?
1) it freed spain to ally with britain.
2) it left fewer british troops to fight in north america.
3) it protected trade between spain and britain.
4) caribbean nations were free to aid the united states.

The fighting between France and Britain in Europe and the Caribbean helped the American cause because 2) it left fewer British troops to fight in North America. The Americans had often felt ill-equipped compared to the British army, so the less people there were fighting for the British side, the better.