Battles of Tali and Ihantala were more than just finns sitting in a treeline and killing russians. How you just described it, it just sounds another generic.
Also, what exactly _is_ Viipuri-Petroskoi offensive? Do you mean the attack phase in 1941? Or perhaps the russian offensive on isthmus and olonets in 1944?
How I understood, you mean the attack phase when finns were advancing. Well, it wasnt Viipuri-Petroskoi offensive as the main weight originally was towards Ladoga's Karelia and to reach river Svir. But from the main attack formations a new group was formed in order to take Petroskoi and then move to Seesjärvi region at Maaselkä. Offensive on Isthmus was launched a lot later than the original attack towards Ladoga's Karelia.
How could you make such idea into a map thought? Again, you would have to pick a battle from the attack phase and base a map on that. Just having a "Viipuri-Petroskoi Offensive" as a map name would yet again be very generic, and thus unrealistic.
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Now that you opened pandora's box, I must say that the campaign of Tali-Ihantala would alone house roughly 30 different maps set on real battles, and those are only the big noted battles if you tie several battles together into one map. If you made one map for each known battle from the campaign, you would have a hundred. And this is not counting all those hundreds of small firefights that were going on all the time around the clock, only the really important battles are taken into the count. So slapping finns to defend a random treeline with fausts Suomi's against the russian tank assaults, name it Tali-Ihantala and yet you would have another generic and historically inaccurate map which doesnt light my fire. FH2 is well known from taking real life places and turning them into maps. Names of places you can find from google, wikipedia and google earth. Some of these maps are also highly accurate resemblances to the real life locations. So with the idea of yours (no offense, its nothing personal, just a great example of exactly what I meant in my previous post) the map would just be real in any sort of ways.
Of course there are people around who will say screw history and realism, lets have a cake and a fun map. FH2 has proven that historically accurate maps can and ARE fun. Not only do they create immersion and grab you in the moment you are loaded (minus Aberdeen, Bardia...) but with realistic enviroments and locations, players can actually have an idea what these places are like in real life and how they were in the 40's. That is why I love FH2's map design and dedication to historical accuracy because they can also educate people on a some degree.
Again, someone can and will most likely say to me "ok so what finnish map would you want then mr goodie-two-shoes when our ideas arent pleasing you?", thank god I have been diving in and out the battles of summer -44 so much I can name a whole release-worth of battles and map ideas.
Old timers of this community can just guess which battles I would throw on the desk.
Peace out!
EDIT: Finnish Sturm's didnt fight against IS-2's. Sorry. IS-2's were _very_ rare on the finnish fronts.
EDIT #2: Please notice that this isnt a bitch message towards Paavopesusieni, nor anyone else.