 Complete the following phrase:  The territory of Estonia has been inhabited since at least 9,000 BC. Ancient Estonians became some of the last European pagans to adopt Christianity following the Livonian Crusade in the 13th century. After centuries of successive rule by Germans, Danes, Swedes, Poles and Russians, a distinct Estonian national identity began to emerge in the 19th and early 20th centuries. This culminated in independence from Russia in 1920 after a brief 