Thirteen paintings once hung in a gallery glorifying Frederick Henry’s military triumphs. This is the only one that has been preserved: it depicts his victory on 29 April 1636 at Schenkenschans, on the Republic’s eastern border where the rivers Rhine and Waal split. Whoever controls this stronghold, controls access to the country. While Schenkenschans is being attacked from the rivers, a fierce battle between a combined Dutch-French army and Spanish forces is raging in the foreground.