Complex sentence: Meletopoulos participated actively in the Third and Fifth National Assemblies in the following years and engaged in politics in the independent Greek state, becoming mayor of Aigio, Minister of the Interior, Minister of Military Affairs, and twice serving as prefect of Attica-Boeotia.
Split into simpler sentences: Meletopoulos participated actively in the Third and Fifth National Assembly in the following years and he dealt with politics. He was mayor of Aigio, Minister of the Interior, Minister of War, and had twice served as prefect of Attica-Boeotia.