Guinea-Bissau (/ˈɡɪni bɪˈsaʊ/, officially the Republic of Guinea-Bissau) is a country in West Africa. It is the 138th biggest country in the world and the 153th most populous, with a total of 36,125 square kilometres and a population of 1,693,398. It shares borders with Senegal and Guinea. This Republic declared independence from the Portuguese Empire in 1973. Since then, it has suffered political instability and social strife.