I've always been a fan of Commonwealth factions in Wargame, and also mained British in both Company of Heroes games. So it stands to reason that it'll probably be a Canadian or British division.
it's pity that allies lacked decent tanks like Panther or IS
Lol
I don't know much about the IS, but the Panther was a janky, unreliable-as-hell tank that was pressed into service before it was ready. It was also difficult to sight, and it had a curved turret mantlet that caused deflecting shots below the barrel to go straight into the thinner top armor. Turret rotation was also not only very slow, it varied by engine speed (compared to the Sherman's electric turret that could spin 360 degrees in 15s, the Panther took anywhere from 15-45s depending on engine RPM), which meant that to spin the turret quickly, the driver either had to gun it and fire on the move, or be an easy target revving the engine in neutral.
The Sherman was the best tank in its class in the time period. Reliable, easy to service, and well-protected against most threats shy of the heaviest German tanks, most of which were produced in relatively small numbers and suffered big reliability problems that caused many of them to be destroyed by their own crews so that they couldn't be captured after breaking down. Wet ammo storage racks, soft steel, and spring-loaded crew hatches also made it incredibly safe as far as tanks of the era went — crew survival rates for knocked out Shermans were very high.
Unfortunately, the fantasy depiction of the war represented in movies and video games portray little to none of these advantages and disadvantages.
In a strict firepower sense, upgraded Sherman designs that were on a much more even footing with the German heavy tanks were ready for the Normandy campaign, but they weren't deemed necessary and thus weren't brought along. The Sherman Firefly gained such a deadly reputation simply because it was the best long-range tank destroyer the Allies brought with them, not because it was inherently the best variant of the Sherman. The 75mm American Sherman was still perfectly capable of battling it out with Panthers at closer ranges, where its faster turret rotation was a big advantage.