The Lagos colony and the Southern Protectorate was almagamated in _____.

The Lagos colony and the Southern Protectorate were amalgamated in 1906. The British government, which had established both colonies as separate entities, decided to merge them into a single administrative unit in order to improve governance and efficiency. The new entity was named the Colony and Protectorate of Southern Nigeria, with Lagos serving as its capital. The amalgamation also marked the beginning of a process that ultimately led to the creation of modern-day Nigeria in 1960.