Complex sentence: Three thousand Druze under Zayd Beg besieged the citadel of French legionnaires under a Captain Granger between 20 and 24 November, but eventually suffered their first major defeat to French reinforcements, with heavy casualties marking a turning point in the Druze invasion of southern Lebanon.
Split into simpler sentences: Three thousand Druze under Zayd Beg besieged the citadel of French legionnaires under a Captain Granger between 20 and 24 November. The Druze eventually suffered their first major defeat to French reinforcements, with heavy casualties marking a turning point in the Druze invasion of southern Lebanon.