What was the contributing factor to Napoleon’s defeat at the Battle of Trafalgar?

Napoleon joined forces with Spain to build a fleet that could challenge Britain, but the British navy defeated the combined French and Spanish fleets at Trafalgar in 1805. Thus, the choice describing Napoleon enlisting Spain’s help but being defeated anyway is correct. Spain did not ally with Britain in this battle, and the coalition was not made up of every European country except France.

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