A very important question in this time and day but one that hardly any know the real answer to. Oh sure we all hear how Zion moveing to a safer location and steping our of the sniper scope has caused it but was that really it? Lets ask the Agents.
Agent Gray: Operative, Cypherite spies have confirmed the existence of a new base built by Zion, intended to protect them from the threat of extermination by our Sentinels should they break the Truce.
This action itself directly undermines the function of the Truce. We have been directed to prevent Zion from extracting more humans from the pods. The use of force against Zion operatives has already begun.
Agent Pace will provide further details of the current situation. (source)
Ah so Zion moveing does have something to do with it. No wait, undermines...hmm that doesnt sound like "break" to me so lets look it up.
Undermine: To weaken by wearing away a base or foundation. To weaken, injure, or impair, often by defrees or imperceptibly; sap. (soruce)
Nope, defently not break, sorta funny sence I guess both sides have been doing this alot. The vials, Cypherites, General, and then moveing a city and all. So it seems we must look further. Maybe Pace will have something.
Agent Pace: Welcome, Mr. Kennedy. So, we have finally discovered where the supplies leaving Zion have been going for these many months. They have attempted to escape from the Truce by retreating to a more remote base--a place some of them apparently call "New Zion." They seem to hope that a combination of natural strata layers and EMP charges will allow them to disrupt the System with impunity. They will find that they are mistaken.
Zion underestimates our knowledge of their network interfaces within the simulation. Most of their secrets here are already known to us. As they have chosen to violate the law they agreed to follow, they will be punished, and their operations disrupted. Agent Gray will give you your first target. (source)
"They have attemtpted to escape from the truce" Ah ha! Motive! But wait...do we have anything to prove it? Hmm, "They seem to hope that a combination of natural strata layers and EMP charges will allow them to disrupt the System with impunity." Yes! More motive! But wait....proof of it? *CENSORED* must keep reading. Gray, anything else to add?
Agent Gray: Operative, it is not unexpected that you may have certain feelings or sentiments relating to Zion, and the humans therein. I want to make it clear that we do not engage in the unnecessary termination of life; neither do we take hostilities against Zion lightly. However, Zion's action in constructing a new fortified base reveals a clear intention to resume their past activities of attempting to damage the System, and in this circumstance, the lives of the vast majority of mankind reliant on the continued operation of the Matrix, not to mention the existence of the many programs whose existence depends upon the simulation, must take priority. (source)
Yes we finally have it! "However, Zion's action in constructing a new fortified base reveals a clear intention to resume their past activities of attempting to damage the System, and in this circumstance, the lives of the vast majority of mankind reliant on the continued operation of the Matrix, not to mention the existence of the many programs whose existence depends upon the simulation, must take priority." Wait....huh? Again a motive with no proof?
Answer: The Machine's have ended the truce with Zion because they THINK Zion will attempt to harm the system now that they are no longer in danger of a sentinel attack despite nothing to suport this claim.
President Sanders, there are no WMDs in New Zion.

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