Moscow is behind us?
 

Ok....so, about how long normally does it take for the defense line objective to update? When I first did this mission it was about 20 mins...ish. Then I hadnt edited in any more units. Im playing it again w/ 2 Edited in T34/85s and its like an hour later and nothing...also I noticed the engineers working on the defense line are in the fight shooting the enemy and not doing what they are told. How do u make it update even w/ edited in units. Also, Commisar.....shoot these traitor engineers......

If the engineers are fighting and not laying mines then it's probably safe to fall back to the secondary line and you'll trigger the next part.