For 10 points, name these people whom Stephen Decatur fought at the Battle of Tripoli, marauders who operated off a namesake North African coast.
A recent history by Giles Milton describes the encounter of these people with a Cornish boy named Thomas Pellow. The town of Baltimore in Ireland was once emptied by one of these people, Jan Janszen, who also served as president of the Republic of Salé. Simon the Dancer was known for becoming one of these people, as was a man called "Birdy," Jack Ward. These people operated warehouses called bagnios where their laborers spent the night. A man who began his career as one of these people later defeated (*) Andrea Doria at the Battle of Preveza. Miguel de Cervantes spent five years as a slave after being captured by these people, and Hayreddin Barbarossa was one of these people before becoming an Ottoman admiral. For 10 points, name these people whom Stephen Decatur fought at the Battle of Tripoli, marauders who operated off a namesake North African coast.
A recent history by Giles Milton describes the encounter of these people with a Cornish boy named Thomas Pellow.
Barbary pirates [or Barbary corsairs; prompt on pirates or other synonyms]