Final answer:
The Angolan War of Independence spanned 13 years from 1961 to 1974, culminating in Angola's independence in 1975 and a subsequent civil war.
Step-by-step explanation:
The Angolan War of Independence lasted for 13 years, starting in 1961 and ending in 1974 with Angolan independence being officially declared in 1975. The war was between Angola, a Portuguese colony, and the colonial forces of Portugal. Independence movements led various factions, including the National Liberation Front (FNLA), the Marxist People's Movement of Liberation of Angola (MPLA), and the National Union for the Total Independence of Angola (UNITA). After achieving independence, Angola was quickly engulfed in a civil war that lasted another 27 years, deeply dividing the country as it battled through Cold War influences and internal strife.