Complex sentence: Serious opposition to British rule in Nigeria, however, did not end with the Aro expedition, though there were still pockets of resistance in different parts of the country which called for a number of patrols.
Split into simpler sentences: Serious opposition to British rule in Nigeria, however, did not end with the Aro expedition. There were still pockets of resistance in different parts of the country, which called for a number of patrols.