Complex sentence: The Walcheren expedition (July 30-December 10,1809), a British military operation during the Napoleonic Wars, formed the last in a series of operations in Flanders (present-day Belgium) in 1809.
Split into simpler sentences: The Walcheren expedition (July 30-December 10,1809) was a British military operation during the Napoleonic Wars. It was the last in a series of operations in Flanders (present-day Belgium) in 1809.