Complex sentence: The battle was a major victory for the Royal Navy despite being outnumbered, in which four Spanish ships were captured and seven crippled, including the largest warship afloat at that time-the "Santísima Trinidad".
Split into simpler sentences: The battle was a major victory for the Royal Navy. Despite being outnumbered, it captured four Spanish ships and crippled seven, including the largest warship afloat at that time-the "Santísima Trinidad".