United Nations Security Council Resolution 277, adopted on March 18, 1970, concerned the state of Southern Rhodesia, now known as Zimbabwe. The Council reaffirmed its previous resolutions and noted with grave concern that efforts thus far to bring the rebellion to the end had failed, some countries (Portugal and South Africa mentioned specifically) had not been obeying the Council's resolutions and that the situation in Southern Rhodesia continued to deteriorate as a result of the regime's new measures.