I would like to ask about design of a military wheeled vehicle: why it was done that way and not the other.
At the moment your question is a bit vague (but maybe that was intentional). If you can supply more details (photos etc.) it might be welcomed by Engineering Stack Exchange. They have quite a few questions about automotive engineering and I suspect your question might fit under that umbrella. For example, this question about military vehicle design: What is the rationale for a 6x6 truck chassis with 2 axles front vs. 6x6 chassis with 2 axles rear?
As always, please check their Help Center before asking.