Armin Theophil Wegner (October 16, 1886 – May 17, 1978) was a German soldier and medic in World War I, a prolific author, and a human rights activist.

"[4]: 240  Noting that he was writing the letter as a proud German who could himself trace his Prussian familial roots back to the time of the Crusades, Wegner asked Hitler what would become of Germany if it continued its persecution of Jews.

[7] Wegner joined the German army at the outbreak of World War I, serving as a medic in Poland during the winter of 1914–1915, where he was awarded the Iron Cross for rendering care under fire.

[9] Disobeying orders intended to smother news of the massacres (as the Ottoman Empire and Germany were allies), he gathered information on the massacres, collected documents, annotations, notes, and letters and took hundreds of photographs in the Armenian deportation camps in Deir ez-Zor,[5] which later served to evidence the extent of the atrocities to which the Ottoman Armenians were subjected.

[3]: 259 Wegner protested against the atrocities perpetrated by the Ottoman government against the Armenian people in an open letter, published in the Berliner Tageblatt, submitted to American President Woodrow Wilson at the peace conference of 1919.

Also in 1919, Wegner published Der Weg ohne Heimkehr (The Road of No Return), a collection of letters he had written during what he deemed the "martyrdom" (Martyrium) of the Anatolian Armenians.

[5] His efforts during the aftermath of World War I and the fall of the Ottoman Empire explicitly advocated a separate Armenian nation as a path to reconciliation, which raised difficult political questions.

[12] The documents of the sensational trial were collected into a book, Justicier du génocide armènien: le procès de Tehlirian, for which Wegner authored the preface.

[6] On April 11, 1933, shortly after the Nazi boycott of Jewish businesses, Wegner denounced the persecution of Jews in Germany in an open letter to Adolf Hitler.

[7] A 2000 documentary film, Destination: Nowhere (The Witness) directed by Carlo Massa and produced by Dr. J. Michael Hagopian, depicted Wegner's personal account of the Armenian genocide through his own photographs.

Recalled by some as "the only writer in Nazi Germany ever to raise his voice in public against the persecution of the Jews", by the time of Wegner's death in Rome he had been "virtually forgotten" by the German people.