Thanks to carramba66 for this one.
Apparently, the maps/icons/historicalBattles folder of the 9.0 test client contains some additional historical battles icons
Apart from Prokhorovka (Kursk), Ardennes battle (announced earlier) and Lake Balaton (also in the test), we can see more icons there:
- Briansk (probably referring to the city of Bryansk in western Russia, occupied by Germans from 1941 to September 1943), we can expect more Kursk-style battles I guess.
- Tobruk, most likely referring to the Siege of Tobruk in 1941, most likely involving Germany and Britain
- Taifun, probably referring to Operation Taifun, or – as Russians call it – the Vyazma operation, taking part in September to October 1941, resulting in German victory