After mass deportations had begun, the members of the Cimade became more and more involved in "illegal" activities. The Secretariat of the Cimade at Nimes provided false identity cards. "We set up a record by once producing fifty identity cards in one night." [348] Several members of the Cimade were active as guides, bringing refugees through the mountains to safety in Switzerland. "According to my estimations, we helped to evacuate about four hundred persons, from August, 1942, until December, 1943." [349] After the Swiss Government had ordered that refugees who had illegally entered into Switzerland be returned to France [350] the Rev. M. Boegner obtained in Berne the agreement that non-Aryans coming from France for whom he had given personal guarantee, would be admitted. [351] <150> 24 YUGOSLAVIA On April 5, 1941, Yugoslavia concluded a treaty of friendship with Moscow, and within hours Belgrade was bombed by the German air force. Yugoslavia was dismembered by the Nazis. The north-eastern part, the Backa basin, with 20,000 Jews, came under Hungarian annexation. Old Serbia, where 12,000 Jews lived, came under German occupation. In Croatia, with 21,000 Jews, a puppet regime was established. The Bulgarian-annexed territory of Yugoslavia (Serbian Macedonia) contained between 7,000 to 8,000 Jews. Before the war, Yugoslavia harboured some 70,000 Jews. Fifty-five thousand of them were murdered. [352] The greatest non-Roman Catholic Church in Yugoslavia is the Serbian Orthodox Church. Much smaller Churches are: the Reformed Christian Church of Yugoslavia and the Slovak Evangelical Church of the Augsburg Confession in Yugoslavia. None of these Churches replied to my circular letter. The persecution of Orthodox Serbs matched the persecution of Jews, both in cruelty and fanaticism. [353] I hardly found any material about the attitude of the Churches in Yugoslavia; only the following quotations can be mentioned: