>Some extremely strict forms of
>sensha-dō take that restriction even further and require that
>teams limit themselves only to equipment that would logically have
>been operated by one combatant force in that war (e.g., all Soviet
>equipment, all German, or mixed UK and US hardware), but that rule is
>considered archaic and optional even under the modern Co-Prosperity
>Sphere Ministry for Sport regulations.

Let me guess: This rule was all too vulnerable to competitors doing historical research to justify why their 'Soviet' force has a Sherman, (lend-lease), or their 'German' one a T-34, (captured).