Herman Lieberman

He was promoted to the rank of lieutenant and took part in the Battle of Kostiuchnówka, for which he was awarded the Polish Cross of Valor.

After World War I Lieberman became a leader of the Polish Socialist Party (PPS), serving on its executive committee.

He was arrested and beaten by the police and then sentenced in the 1931–32 Brest trials to two and a half year in prison.

While abroad he supported the republican cause in the Spanish Civil War and published a critical response to Marcel Déat's pamphlet Why Die for Danzig?

During World War II, after the 1939 German invasion of Poland, Lieberman joined Władysław Sikorski's Polish government-in-exile in London, England.