The flag of Mozambique was adopted on 1 May 1983. It includes the image of an AK-47 with a bayonet attached to the barrel crossed by a hoe, superimposed on an open book. It is one of four national flags among UN member states that features a firearm, along with those of Guatemala, Haiti and Bolivia. Green stands for the riches of the land, the white fimbriations signify peace, black represents the African continent, yellow symbolises the country's minerals, and red represents the struggle for independence. The rifle stands for defence and vigilance, the open book symbolises the importance of education, the hoe represents the country's agriculture, and the star symbolises Marxism and internationalism.