Boris Gudenuf
Deity
Not a tank nut, but these tanks model looks like WWII or early Cold War tanks, and PRC tanks around the time usually has a domed turret that looks like an upside-down Chinese frying pan. These tank models look nothing like PRC tanks.
To me the in-game tank model looks like Tiger I but with its turret backwards. Anyway, we may need to consult @Boris Gudenuf on this case.
Both the tanks and the towed antitank gun to the right of the ones in front appear to be 'artist's conceptions' not specifically modeled on actual vehicles.
The tank turrets most closely resemble the 'conical turret' used on late-model versions of the Soviet T-26 and BT-7 tanks of the late 1930s, but with a commander's cupola on top, which no Soviet medium or light tank had until 1943. The sloping front hull with a vertical bulge where the driver (presumably) sits is like nothing I can find on any tank built since 1940.
The towed guns at a glance resemble the 75mm guns used towards the end of WWII, but none of the historical guns - the German 7.5cm Pak 41, the Soviet ZiS-3, the American M5, nor the British 17-lber, had a trapezoidal top to the gun shield - all had flat-topped shields.
The infantry also appears to be 'generic', although saying they definitely aren't PRC is harder: up until the 1960s the PRC was still equipped with a great deal of 'hand-me-down' Soviet and Japanese material from the 1940s so there was a near-bewildering variety to PRC infantry until about 8 - 10 years after the Korean War.
On the other hand, no one has said anything about the ships bearing down on the coast:
The angled-deck aircraft carrier is a post-WWII design first used by the Royal Navy.
The battleship to the right of the carrier is configured with main guns in 4 turrets, 2 aft and 2 forward with 2 guns each, which is a typical British or German design, not Japanese or American.
The smaller ship is, relative to the carrier or the battleship, too big to be a Destroyer, but appears in any case to be another post-WWII design: it has what looks like a helicopter pad aft of the superstructure and what looks very much like a cruise missile or other missile installation in front of the superstructure, which would appear to make it siilar to 'missile frigates' or 'missile cruisers' of no earlier than the late 1960s . . .
And note the landing craft at the top left: Humankind may be giving us a taste of the real expense of modern amphibious landings, which require special purpose landing craft and landing ships of all kinds