At the outbreak of war in Europe in 1939, Weizmann was appointed as an Honorary adviser to the British Ministry of Supply, using his extensive political expertise in the management of provisioning and supplies throughout the duration of the conflict. He was frequently asked to advise the cabinet and also brief the Prime Minister. Weizmann's efforts to integrate Jews from Palestine in the war against Germany resulted in the creation of the Jewish Brigade of the British Army which fought mainly in the Italian front. After the war, he grew embittered by the rise of violence in Palestine and by the terrorist tendencies amongst followers of the Revisionist fraction. His influence within the Zionist movement decreased, yet he remained overwhelmingly influential outside of Mandate Palestine.