This drawing is a preliminary study for the monumental wall painting The Battle of Cascina, which Michelangelo planned to paint next to Leonardo’s Battle of Anghiari in the Palazzo della Signoria in Florence. Both paintings were never completed and are only known through preparatory drawings and copies. Michelangelo prepared his depiction of the Florentine troops’ victory over the Pisan army in 1364 as far as the cartoon – a true-to-scale preliminary design. It presented figures in the nude displaying unprecedentedly spectacular muscular bodies, powerful movements, and daring foreshortening. This back view of a nude drawn from life was made in preparation of a soldier with a lance in the background of the composition. At first Michelangelo determined the pose with delicate outlines and then modelled the muscular curvatures in detail. They are meant to visualise the boisterous energies dwelling inside the body, bridled by the powerful contours and nevertheless impacting on the surrounding space. The same technique was used for the cartoon, which soon after its completion was cut apart and is lost today in its entirety.