Nigeria is a country with a diverse population, made up of many different ethnic groups. Prior to the amalgamation of Nigeria in 1914, the area now known as Nigeria was made up of various distinct and independent kingdoms and societies, each with its own unique culture, language, and way of life.
These different kingdoms and societies were made up of various peoples and ethnic groups, such as the Yoruba, Igbo, Hausa, Fulani, and many others. Each of these groups had its own history, traditions, and customs, and they often interacted with each other through trade, migration, and warfare.
So, to answer the question, Nigeria was a conglomerations of peoples and ethnic groups before the amalgamation in 1914.