In 1929 Sándor arrived in Antwerpen, Belgium, on his way to South-America as an emigrant. He remained in Antwerpen and made contact with the local workers’ movement. In 1931 he was accepted in the Hungarian section of the communist party in Antwerpen. Sándor was arrested, imprisoned for a year and deported to Paris. In 1935 he returned to Belgium, was arrested and sent back to Hungary. Although he was under police surveillance, he was active in the trade unions and a member of the social-democrat party. In 1936 he organized volunteers for the civil war in Spain and operated in the industrial suburbs of the capital.
After the Germans invaded Hungary on 19.3.1944, Sándor served as the liaison between the central committee of the underground communist party and the “Hashomer Hatzair” movement. These connections led to cooperation in the supply of forged documents from the “Hashomer Hatzair” side, and the finding of shelters for young Jews from the other side. After the liberation in January 1945, Sándor held various management positions in the new Hungarian regime.
