Of course! From 1803 to 1815 Britain remained at war the entire Napoleonic War period. Britain's Duke of Wellington also played a major role in the Battle of Waterloo in which Napoleon was finally...
Geography had little effect except that Wellington had selected the battlefield and controlled strategic high ground and the few available man made areas that could be used as strongpoints.
The british Navy was far superior than that of the British army. He was also unable to break the blockade the British made to stop trade between France and other countries.