The sole Douglas XA-26A night fighter prototype.

The last of the Halberstadt single-seat fighters, the D V, which remained in first-line service in Palestine well into 1918.

The last of the Halberstadt single-seat fighters, the D V, which remained in first-line service in Palestine well into 1918.

A J22 of the F9 Wing of Flygvapnet at Gothenburg.

Three-view drawing of the J 22.

The Halberstadt CL II, an extremely successful two-seat fighter that became the mainstay of the Schutzstaffeln formed to provide protection for reconnaissance aircraft.

The Halberstadt CL II, an extremely successful two-seat fighter that became the mainstay of the Schutzstaffeln formed to provide protection for reconnaissance aircraft.

The De Monge M.101 C2, a French-built derivative of the Koolhoven F.K.31.