The Tanakh Podcast

Chapter 13 lists the tribal portions of Reuven, Gad and Menashe on the East bank of the Jordan river.
But is this land part of the land of Israel? The text of Sefer Yehoshua is somewhat ambivalent about this region, a negativity with roots in the Torah.

Chapter 12 is a victory song!
Hooray! We have defeated 31 kingdoms!
But open chapter 13. "Joshua!" says God; "There is lots more to conquer!" 
So, was it a total and comprehensive conquest or only a partial one?

This fourth campaign in Israel's military conquest is absolutely natural; no miracles at all.
But why does God instruct Joshua to destroy the chariots and hamstring the horses of the enemy? What is God teaching the Israelites?

Joshua comes to the aid of his new allies, the Gibeonites, as they are attacked by five Canaanite armies.
This provides him with a lucky opportunity to battle the enemy in the open, outside the protective walls of their cities. 
This military campaign obliterates the Canaanite enemy in the South of the country.

The Gibeonites trick the Israelites into thinking that they are from a distant locale.
Was peace an option with the Canaanite nation?
The Gibeonites clearly thought that local tribes would be slaughtered wholesale. What does the Torah say about this?