What were some reasons for the fall of the song dynasty

The reasons for the Song Dynasty’s fall are large bureaucracy and the war are constant and it cost too much money for the war that create more complications and wild. Also the army was run by civilians and become in effective. The political corruption also cause why the song dynasty become weak.

an expansion is one of two basic business cycle phases; the other is contraction. the transition from expansion to contraction is a peak, and the changeover from contraction to expansion is a trough.