John Smith (explorer)
Smith left home at the age of 16 and went to sea. He served as a soldier in the army of Henry IV of France against the Spaniards, fought for Dutch revolt from the Spanish King Philip II of Spain.  He went to the  Mediterranean Sea where he worked in both trade and piracy.  He then fought against the Ottoman Empire in the Ottoman wars and for the Austrian Habsburgs in Kingdom of Hungary in 1600 and 1601.