Their emblem was the Jolly Roger, a black flag featuring the skull and crossbones. Jolly Roger consisted of a skull and crossbones. Above these symbols are both the symbols of the skull and crossbones and the owl. Supporters adopted the skull and crossbones as their own unofficial emblem. Depictions of the Blackshirts often include a skull and crossbones. Variations on the skull and crossbones have been used by several military forces. Then, in his office, Red Skull introduced Lukin to his old/new associates Crossbones and Sin. After fleeing from Dracula's vampire army, Crimson Widow and Crossbones are apprehended by the Avengers. Gruenwald created several new foes, including Crossbones and the Serpent Society. This led him to crush Vulture with his hands and step on Crossbones. Joining them was Juggernaut, Ghost, Crossbones, and Man-Thing. Frank Grillo portrays Brock Rumlow / Crossbones in the Marvel Cinematic Universe. During an attempt to reason with Kobik, Rogers is attacked by Crossbones. She helped thwart an attempt on the Kingpin's life by Crossbones. The gravely wounded Crossbones was then taken into S.H.I.E.L.D. custody once again.