Multinational Core Force Question

[Mobhack]

On the other hand, SPMBT is centered around company - battalion sized units - the scale is, IMO, too small for allowing realistic mixed core units.

It would be beter idea to add other nations as auxilaries in missions.

precisely the point.

You may find multi-nationals mixed at brigade level (though division and above is most likely). But any batallion sized action or lesser level, these allied troops are going to be brought in for the one battle only - auxiliaries or allies in SP terms.

Allied/foreign troops in mixed formations will incur a duplicated supply chain at the very least for the differing kit, ammo, spares etc - not to mention differences in radio/arty procedures, codes, coding devices and so on along with different command/orders structures and so forth. NATO (for example) may have "NATO standards" in these fields, but these are bare minimuns, and not really designed for mixed bns - just to allow interoperability with less friction at the formation level.

Cheers
Andy