Sturmovik Campaign - Mission 10 On Duty

[Chief_Biv]

So far I have enjoyed this campaign. I am actually playing it in the original A-10C to see if I can get good without relying on the headvisor and laser guided rockets.

However, I have tried this mission a few times now - all unsuccessful.

Step 1 - I take out the team blue guys near the red squad as directed. I then call in destruction of those targets and I am told to return to base.

Step 2 - I rearm and refuel and then head back out to the same area to tackle the blue guys on the other side of the river

Step 3 - Using CBU 105's, Mavericks and Gun I eliminate all the blue guys

Step 4 - I call in the destruction of all targets and then I am ordered to egress.

Step 5 - I egress and head back to base. Upon crossing the threshold to land I receive the message "You have left the battle area - Mission Failed".

I have done this three times. Can someone advise what I have missed to succeed in this mission?