 With the British conquest, Jews who had been expelled by the Ottomans were able to return, and Jewish immigration picked up again.The Third Aliyah saw about 40,000 Jewish immigrants arrive in Palestine from 1919 to the start of an economic crisis in Palestine in 1923, and between 1924 and 1928, the Fourth Aliyah saw about 80,000 more Jewish immigrants arrive in Palestine and the Fifth Aliyah, which took place between 1929 and 1939, saw the arrival of an estimated 225,000 to 300,000 Jewish immigrants.During this time, land continued to be purchased by Jews, many new Jewish settlements were established and existing Jewish communities in urban areas continued to grow.