HMS Orion

• Allied invasion of Italy
• Allied invasion of Sicily
• Battle of Calabria
• Battle of Cape Matapan
• Battle of Cape St Vincent (1797)
• Battle of Crete
• Battle of Greece
• Battle of Groix
• Battle of Jutland
• Battle of Trafalgar
• Battle of the Atlantic
• Battle of the Nile
• Crimean War
• Dodecanese Campaign
• French submarine Orion
• Glorious First of June
• Greek mythology
• Malta Convoys
• Mediterranean, Middle East and African theatres of World War II
• Operation Dragoon
• Operation Neptune
• Operation Shingle
• Orion (mythology)
• Ottoman Empire
• Royal Australian Navy
• Royal Navy