Romania's interaction with the West temporarily decreased, however, with the 1956 Hungarian Revolution and the violent response of the Soviet Union to the uprising. Still, Gheorghiu-Dej continued to strengthen the independence from the Soviet Union. For example, Romanian schools dropped the Russian language requirement. And, obviously, Romania endorsed the Moscow Declaration of 1957 which stated that "Socialist countries base their relations on the principles of complete equality, respect for territorial integrity, state independence and sovereignty, and non-interference in one another's affairs… The socialist states also advocate the general expansion of economic and cultural relations with all other countries…" These statements coincided with Gheorghiu-Dej's claims to national sovereignty and independence.