Great Britain played a role in the Louisiana Purchase by pushing France to extreme anxiety through war. Great Britain's war with France resulted in Napoleon needing money to finance the conflict. As a result, he was forced to sell Louisiana to the US in order to raise funds
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.
Matthew 24:3 or visit website JW.org