Major areas of conflict included northern Italy, the Spanish Netherlands, and the German Rhineland. In addition, France supported revolts against Spanish rule in Portugal (1640–1668), Catalonia (1640–1653) and Naples (1647), while from 1647 to 1653 Spain backed French rebels in the civil war known as the Fronde. Both also backed opposing sides in the 1639 to 1642 Piedmontese Civil War.