• United States Fifth Fleet
• IJN 5th Fleet
  IJN 5th Fleet
  The was a fleet of the Imperial Japanese Navy, active during the early portions of the Second Sino-Japanese War, and again in World War II, primarily in the Battle of the Aleutian Islands.-China Expeditionary Fleet:...
  
  , Imperial Japanese Navy
• Luftflotte 5
  Luftflotte 5
  Luftflotte 5 was one of the primary divisions of the German Luftwaffe in World War II. It was formed 12 April 1940 in Hamburg for the invasion of Norway....
  
  

See also

• Fifth (disambiguation)
• Fleet (disambiguation)
• Fourth Fleet (disambiguation)
• Sixth Fleet (disambiguation)