Just to clear things up (or make them even murkier

):
Down through Zhitomir, the campaign tree is following its usual linear pattern. Reading the boxes from left to right, Major Defeat, Minor Defeat, and Draw all lead to Campaign Defeat. Minor Victory and Major Victory go to Novgorod:

- Screenshot 5.jpg (181.42 KiB) Viewed 1650 times
Novgorod is where the detour begins. A Major Defeat still means Campaign Defeat, but Minor Defeat, Draw, and Minor Victory (the equivalent of "inconclusive battle results" perhaps) lead to Anzio. Major Victory skips Anzio in favor of Vyazma:

- Screenshot 1.jpg (178.25 KiB) Viewed 1650 times
Now Vyazma is strange in that one cannot lose. No matter what happens, you are going to Falaise next except if you score a Major Victory in which case, you go to Moscow:

- Screenshot 2.jpg (185.84 KiB) Viewed 1650 times
And Moscow is a no-brainer; no matter
what you do, your next stop is Falaise!

- Screenshot 3.jpg (168.71 KiB) Viewed 1650 times
What about Anzio? It seems to resume the normal linear pattern:

- Screenshot 6.jpg (179.84 KiB) Viewed 1650 times
Which is continued by Faiaise and on down the line to the conclusion:

- Screenshot 4.jpg (177.94 KiB) Viewed 1650 times
So to summarize, at Novgorod (not Vyazma) there begins this detour to Anzio which bypasses Vyazma and Moscow unless you achieve a Major Victory at Novgorod. Even then, only a Major Victory at Vyazma will allow you to play Moscow, otherwise you go to Falaise. Moscow is like a free pass; win or lose, you're going to Falaise.
Whoever made the graphic above should correct it.