As I recall, one of the most interesting things about “The Tanks are Coming” is that the M26 is actually an M46 which is one of the only movies that I know of to feature that tank.
The segment towards the end where the dragon’s teeth are bypassed by dozing an earth ramp over them is also really interesting. The US uniforms and equipment are also perfectly accurate. (Unfortunately, that poor M10-Panther does make an appearance.)