3704128 The Battle on the Slaak between the Dutch and Spanish Fleets during the Night of 12-13 September 1631, 1633 (oil on canvas) by Vlieger, Simon Jacobsz. (c.1600-53); 104x179 cm; Rijksmuseum, Amsterdam, The Netherlands; (add.info.: During the Battle of Cadiz, the Dutch and English united their forces in their struggle against the Spaniards. Here the Dutch four-mast Neptunes by Admiral Johan van Duivenvoorde is supported by the English Ark Royal in an attack on the Spanish San Felipe. In reality, the English ship did not take part in the battle. Aert Anthonisz represented the vessel because it was such an important symbol for the British navy. Thirty Years War, part of the Eighty Years\' War, an armed revolt under the leadership of Protestant William of Orange when the Dutch struggled to gain independence from Spanish rule under the Catholic Philip II.); Dutch, out of copyright.