Why did divisions among the MPLA, FNLA, and UNITA help Portugal retain control of Angola?

The divisions among the MPLA, FNLA, and UNITA significantly weakened the anticolonial resistance, allowing Portugal to maintain control of Angola until the mid-1970s.12

These movements were characterized by deep-seated dissension and conflicting interests:

• Internal Conflict: The three groups frequently engaged in armed conflict with one another rather than focusing solely on the Portuguese colonial administration.12
• Lack of Unity: The MPLA, FNLA, and UNITA drew support from different ethnic bases and relied on competing foreign backers, which prevented the formation of a unified front.123
• Strategic Advantage: This fragmentation allowed the Portuguese authorities to gain the upper hand by the early 1970s. By the time a military coup occurred in Portugal in April 1974, the internal fighting had been so debilitating that all three guerrilla movements had been almost entirely expelled from Angolan soil.12

Ultimately, it was the sheer cost of these colonial wars and rising domestic dissatisfaction in Portugal—rather than a military victory by the divided liberation movements—that led to the collapse of the Portuguese government and its subsequent withdrawal from Africa.3