#Now

This word is used in English to show that what follows it is background information that will help the reader understand the reason for the events that follow. (See: [[:en:ta:vol2:translate:writing_background]])

#The land was not able to support them

There was not enough grazing land and water there for all their animals.

#their possessions

This includes livestock, which need pasture and water.

#could not stay together

"could not live together"

#The Canaanites and the Perizzites were living in the land at that time.

This is another reason that the land could not support them all.