I cannot recommend this game enough.

Not only does it have a vast array of historical battles, but the campaign variance is fantastic. From sleepy French towns to a snowy Ardenne forest during the Battle of the Bulge, to the North African Campaign. The sprite design of the units makes this timeless, in my opinion. The vehicles and units are also historically accurate, so you won't be seeing any King Tigers in Normandy.

One of the most compelling parts of the game is the battlefield damage. After firing wave after wave of artillery, towns become filled with burning buildings, vehicles, and corpses. As for the combat itself, there are some things that are interesting for the time this game was produced, particularly line of sight. Crossing a bridge without due diligence can wipe out a unit without even seeing the enemy, due to them being on high ground. Choosing the right time to use a certain class of air support also adds flavor to the combat, and things can turn sour quickly if you ignore enemy AA guns.

The only real pain points come with AI pathfinding. Often, if you're being pushed by a squadron of tanks, you may have time to vacate, only for a half-track vehicle to block half your army. Infantry units can also be a source of frustration, although it's a neat mechanic how a group of people can knock a track off a tank and leave it stationary. Rather than retreat with your squad, random members may decide to walk into enemy lines. If you're not keeping a close eye on this, it can be pretty frustrating to see a notification that a prime unit has been destroyed - only to learn it was your sniper walking in the front door of a heavily guarded compound. A feature for finding a specific unit is needed, especially for enormous maps with battles taking place in each corner.

The game rewards patience, and it never gets old to plan an assault and execute it perfectly. Managing the logistics of a war is a concept not seen much in other games. Your ammo supply trucks are as important as a tank. I would mention that crashing has been an issue for many users, but I have not experienced any problems personally. The random challenges also add some flavour, for example, a mission may require you capture a crossroads, being too slow won't fail the mission but may triple the threat and give the enemy prime line of sight; there's this sort of pseudo dynamicness which can keep it fresh. It's probably worth noting that time pressure is a mechanic used throughout which may dissuade some people - whether that be holding off reinforcements or capturing/destroying X quickly.