Complex sentence: In 1707 the Lérins were occupied by the English navy, under the command of Sir Cloudesley Shovell, while blocking the military port of Toulon to help the army of Victor Amadeus II duke of Savoy and his cousin Eugene besiege that city.
Split into simpler sentences: In 1707 the Lérins were occupied by the English navy, under the command of Sir Cloudesley Shovell. This was done in order to block the military port of Toulon to help the army of Victor Amadeus II Duke of Savoy and his cousin Eugene besiege that city.