These borders had little to do with ethnic make-up, but the Soviets felt it important to divide the region. They saw both Pan-Turkism and Pan-Islamism as threats, which dividing Turkestan would limit. Under the Soviets, the local languages and cultures were systematised and codified, and their differences clearly demarcated and encouraged. New Cyrillic writing systems were introduced, to break links with Turkey and Iran. Under the Soviets the southern border was almost completely closed and all travel and trade was directed north through Russia.