How are people defending Odessa? It doesn't start with a garrison (let alone a hardened one) or an IDM. The only way you can get a hardened garrison there is if you play the Medium card that allows you to do it (sorry, forgot the card name, it's the one that allows you to convert 4 IDMs or garrisons to Fortified defenses or hardened garrisons respectively). The earliest and probably the only opportunity to do this is in the August I turn (you can't get a Medium card before then as the Soviets). That would seem to be the prescribed/mandatory play if you are to get anywhere near the historical result of having the city hold out for a 10 week siege. Without a hardened garrison, I don't see how it can hold out that long even with a maximum stack (14 defense) as any retreat result will kill the stack.
It's difficult for my old eyes to read the text in this document. I've tried to enlarge the text to no avail. Scrolling seems problematical as well, Holding on the square in the scroll bar results in a very slow scroll that momentarily stops when a full page scrolls onto the screen, then the next page will scroll slowly into view. Have attempted to click on the scroll square and hold while trying to scroll the document. Again, to no avail. Am I out to lunch here and missing something or is this a peculiarity of the program used to access the rules document? For those of you who have watched the television programs, Stalin's Apocalypse and Hitler's Apocalypse. Upon viewing this reality, I can live with a lot of squinting!