What other characteristics and achievements marked the first river valley civilization? ?

plz

Well the river flooded but the river had rich minerals so when it flooded gave the land rich soil which made plant spurt up aver there if u look on a map along the river is all green but other than that all desert. Hope this helps

The case was a u.s. supreme court decision that defined the scope of the u.s. congress's legislative power and how it relates to the powers of american state legislatures. the dispute in mcculloch involved the legality of the national bank and a tax that the state of maryland imposed on it.