The partition of British India in 1947, which created the two independent nations of India and Pakistan, was a defining moment in South Asian history. Pakistan was established as a homeland for Muslims, with territories divided into two geographically separate regions: West Pakistan (modern-day Pakistan) and East Pakistan (modern-day Bangladesh). The formation of Bangladesh in 1971 marked the culmination of a complex political and cultural journey that began with the Partition of British India in 1947. Here we explore the role of colonial history, the impact of religious and linguistic identities, economic disparities between East and West Pakistan, and the struggles of Bangladesh as an independent nation. Through this analysis, it is highlighted that how the failure of Pakistan to unify its diverse population ultimately led to the liberation war and the birth of Bangladesh. Colonialism and the Divide-and-Rule Policy The British colonial era sowed the seeds of religious and communa...