United Nations Security Council Resolution 290, adopted on December 8, 1970, after more invasions of the territory of the Republic of Guinea by naval and military units of Portugal on November 22/23 and 27/28 (codenamed Operação Mar Verde by the Portuguese), the Council reaffirmed its numerous previous resolutions on the topic, including the right of the peoples of Angola, Mozambique and Portuguese Guinea to be freed from the Portuguese Empire ruled by the Estado Novo regime. The Council endorsed the conclusions of the report by the Special Mission to the Republic of Guinea, strongly condemned the Portuguese Government, demanded that full compensation be paid to the Republic and declared that Portuguese colonialism was a serious threat to the peace and security of Africa.