Lieutenant General Andries Jacob Brink, (21 July 1877 – 17 October 1947) was a South African military commander. An Afrikaner veteran of the Anglo-Boer War, he joined the Union Defence Forces (UDF) as a staff officer in 1912 and served in the First World War. He was Chief of the General Staff from 1920 to 1933, initially in command only of Defence HQ but, from 1922, of the whole UDF. He was also Secretary for Defence, head of the civil service Department of Defence, from 1922 to 1937. From 1937 to 1946 he was Commandant-in-Chief of the Burger Commandos, a home defence organisation.