Complex sentence: The Battle of Imbros was a naval action of World War One on January 20th, 1918 where on a Turkish fleet engaged a British fleet off the island of Imbros in the Aegean Sea.
Split into simpler sentences: The Battle of Imbros was a naval action during the First World War. The battle occurred on 20 January 1918 where on a Turkish fleet engaged a British fleet off the island of Imbros in the Aegean Sea.