Portrait of a Member of the Haarlem Civic Guard by Frans Hals https://www.nga.gov/artworks/75-portrait-member-haarlem-civic-guard
Starting in 1568, seven provinces of the Netherlands broke away in revolt against Spanish rule, initiating a war for independence that lasted until 1648. In the early years of the conflict the militias (civic guard companies) of Haarlem in particular put up a heroic fight.
National Gallery of Art, Washington, D.C.