Complex sentence: On completion of his studies at Brienne in 1784, Napoleon was admitted to the elite "École Militaire" in Paris; this ended his naval ambition, which had led him to consider an application to the British Royal Navy.
Split into simpler sentences: On completion of his studies at Brienne in 1784, Napoleon was admitted to the elite "École Militaire" in Paris. This ended his naval ambition, which had led him to consider an application to the British Royal Navy.