After World War II, the UK found itself facing a Jewish guerrilla campaign over Jewish immigration limits, as well as continued conflict with the Arab community over limit levels. The Haganah joined Irgun and Lehi in an armed struggle against British rule. At the same time, hundreds of thousands of Jewish Holocaust survivors and refugees sought a new life far from their destroyed communities in Europe. The Haganah attempted to bring these refugees to Palestine in a program called Aliyah Bet in which tens of thousands of Jewish refugees attempted to enter Palestine by ship. Most of the ships were intercepted by the Royal Navy and the refugees rounded up and placed in detention camps in Atlit and Cyprus by the British.