WI General Sharhbaraz attacked Heraclius in 628 AD?

[Don_Giorgio]

During Heraclius's campaign in Persia in the 620s, mutual suspicion arose between Khosrau II and General Shahrbaraz.... Roman agents showed Shahrbaraz letters indicating that Khosrau II was planning the general's execution. This kept one of the main Persian armies and its best general neutral during this crucial period in Egypt and didnot attacked the invading Heraclius, speeding the end of the war and the Roman victory.
WI Sharhbaraz attacked Heraclius rear and annihilated the Roman army?
How is this altering History? Any thoughts?

[Don_Giorgio]

Persia still falls to the Arabs? ERE falls quicker?

[Nikephoros]

I have read a chronology of Heraclius's Persian campaign. However, I am not sure when that would have happened. How far was Heraclius on his campaign?

Honestly don't know what would happen.

[Don_Giorgio]

Sharhbaraz's armies were stationed in Alexandria by 628 while Heraclius was heading towards Nineveh and Ctesiphon...

[Nikephoros]

Originally Posted by Don_Giorgio

Sharhbaraz's armies were stationed in Alexandria by 628 while Heraclius was heading towards Nineveh and Ctesiphon...

Then I don't think it would have mattered. He would probably be too far away. If I am wrong then let me know.

[Don_Giorgio]

Originally Posted by Nikephoros

Then I don't think it would have mattered. He would probably be too far away. If I am wrong then let me know.

Well Sharhbaraz has 2 options... either he tries to reach Heraclius as soon as he can or he invades Syria and Palestine thus cutting of the Roman army entirely from its bases and supply lines...