In the early morning of March 19, 1915, Lt. Colonel S. N. Miasoedov, a former gendarme officer on active duty with the Russian army in World War I, was hanged after a two-hour trial in Warsaw for treason. Although he was innocent of this charge, Miasoedov's hasty execution, set against the army's disastrous performance in the war against Germany, touched off a wave of "spy mania" that resulted in hundreds of arrests and eventually involved the...