Ba Maw exploited the Saya San revolt and trial to augment his image as a nationalist and patriot. His defense of the rebel, whose unarmed followers had used "magic" and amulets to protect themselves against British bullets, was probably the main factor in his rise to the premiership.

In 1936, building on the popularity derived from his defense of Saya San, Ba Maw founded the Sinyetha Wunthanu (Poor Man's) party, the first Burmese political organization to appeal directly to the economic interests of the masses. Only 16 Sinyetha candidates were elected to the 132-seat legislature, but in 1937 Ba Maw nonetheless managed to emerge as the first Burmese premier after independence from India. He seemed to suffer a steady decline in popularity during his two-year premiership, which was far less radical in practice than it had been in electoral promises.

Allying himself with such younger and more radical Thakin (Our Masters) nationalists as Aung San and U Nu, Ba Maw was the chief founder in 1939 of the Freedom Bloc, which sought to establish contacts with the expanding Japanese to assist in ousting the colonial British from Burma. Jailed by the British in August 1940, he escaped from Mogok jail in April 1942, when the Japanese advanced into the country.

The same year Ba Maw was appointed head of the Provisional Administrative Committee by the Japanese, and in 1943 he assumed leadership of the Independence Preparatory Commission. When "independence" was granted by Japan on August 1, 1943, Ba Maw was named adipati (pseudo-royalist head of state) as well as premier.

Publicly Ba Maw seemed to revel in his new high status despite the restrictions inherent in the Japanese presence. Vanity had been one of his hallmarks, and he clearly enjoyed the privileges of his role as a pseudo-monarch. However, he was too wise and patriotic to be taken in by the Japanese or to feel no compassion for the material and psychological hardships of his countrymen, who had swapped a benevolent colonial ruler for a comparatively harsh one. Accordingly, he played a major role in mitigating the effects of the Japanese presence on his countrymen from 1942 to 1945.

Jailed by the Allies in Sugamo Prison, Japan, after the war, Ba Maw returned to Burma in 1946 but never again played a major political role. As a highly articulate critic, however, he persisted in challenging his country's younger rulers. He was jailed by military dictator Gen. Ne Win in 1966 for contact with proclaimed rebels against the regime. Following his release with other political detainees in 1968, Ba Maw returned to the private practice of law. He died on May 28, 1977.

Ba Maw's own perceptive account of the important years 1939-1946 can be read in his Breakthrough in Burma: Memoirs of a Revolution (1968). The same period is also treated by U Nu in Burma under the Japanese: Pictures and Portraits (1945; trans. 1954). A broader perspective is provided in, John F. Cady, A History of Modern Burma (1958). Also recommended is Frank N. Trager, Burma: From Kingdom to Republic: A Historical and Political Analysis (1966). A brief obituary appears in the New York Times (May 31, 1977).