The Brusilov Offensive was the high point of the Russian effort during World War I, and was a manifestation of good leadership and planning on the part of the Imperial Russian Army coupled with great skill of the lower ranks. According to John Keegan, "the Brusilov Offensive was, on the scale by which success was measured in the foot-by-foot fighting of the First World War, the greatest victory seen on any front since the trench lines had been dug on the Aisne two years before".