Complex sentence: After World War II, the number of Italians in Somali territory started to decrease and by the time of the Somali republic's independence in 1960, their numbers had dwindled to less than 10,000.
Split into simpler sentences: After World War II, the number of Italians in Somali territory started to decrease. By 1960 and the establishment of the Somali Republic, their numbers had dwindled to less than 10,000.