Explanation:
One of the internal factors that led to the rise and growth of nationalism in Nigeria was the return of ex-service men. After the Second World War, many Nigerian soldiers who had fought on the side of the British returned home with new ideas about freedom, equality and self-determination. They had seen how other countries were governed and were dissatisfied with the way they were treated by the colonial authorities despite their service. Their return helped to galvanise nationalist sentiment and to push the demand for independence.