This I don't think is very surprising. Unless the defense expects it and has time to prepare, the speeds achievable by military vehicles, especially combined with well-developed road infrastructure of modern urbanized countries, means that the attacker can easily cover large distances fast.
In other words: APCs on a highway are not that different from intercity buses, and highways are designed to let you cross the country quickly.
In other words: APCs on a highway are not that different from intercity buses, and highways are designed to let you cross the country quickly.