Complex sentence: The people were soldiers and little else (even the sailor belonged to the state), hence the sudden collapse of Assyria when drained of its fighting population in the age of Assur-bani-pal.
Split into simpler sentences: The people were soldiers and little else; even the sailor belonged to the state. Hence the sudden collapse of Assyria when drained of its fighting population in the age of Assur-bani-pal.