Dragon's teeth (fortification)

Dragon's teeth are pyramidal anti-tank obstacles of reinforced concrete first used during the Second World War to impede the movement of tanks and mechanised infantry. The idea was to slow down and channel tanks into killing zones where they could easily be disposed of by anti-tank weapons.

They were employed extensively, particularly on the Siegfried Line.^[1]^[2]^[3]

^ Wilson, Joe (1999). The 761st "Black Panther" Tank Battalion in World War II. McFarland. p. 150. ISBN 0786406674. This section of the Siegfried Line sat in the middle of the Hardt Mountains, where the landscape was dotted with pillboxes and dragon teeth tank obstacles.
^ Bohner, Roy. "Baptism of Fire on the Siegfried Line". 11th Armored Division Legacy Group website. Retrieved 26 February 2013. it was late afternoon on 18 Feb when [we] passed through the Siegfried Line dragons teeth
^ Owens, Emiel W. (2006). Blood on German Snow: An African American Artilleryman in World War II and Beyond. Texas A&M University Press. p. 56. ISBN 1585445371. Human-made obstacles such as the "dragon teeth" were integrated carefully into the defense system of the line.