This paper examines the complex interplay of internal political structures and external military pressures that shaped the trajectory of the Vijayanagara Empire (1336-1646 CE). As the last major Hindu kingdom in South India, Vijayanagara's political organization, military innovations, and cultural patronage enabled its rise to prominence and sustained it for three centuries amid significant pressure from neighboring sultanates. Through analysis of primary sources, archaeological evidence, and recent historiographical debates, this study argues that Vijayanagara's eventual collapse stemmed not merely from military defeat at Talikota (1565), but from long-developing internal contradictions in its political structure—particularly the tension between centralized authority and the devolution of power to military governors (nayakas) who eventually asserted independence. This research contributes to a more nuanced understanding of state formation and imperial decline in pre-modern South Asia, challenging simplistic religious or deterministic narratives about the empire's fate.