Complex sentence: The Buenos Aires-centric 1819 Constitution in tatters, a state of anarchy ensued, generally; indeed, the only cause which began to bring unity to the disparate parties was the 1825 invasion of what today is Uruguay on the part of Brazil.
Split into simpler sentences: The Buenos Aires-centric 1819 Constitution in tatters, a state of anarchy ensued, generally. Indeed, the only cause which began to bring unity to the disparate parties was the 1825 invasion of what today is Uruguay on the part of Brazil.