A few modern campaign questions

[Sergio65]

Another few questions, this one concerning supply

1) Are supplies exclusive to nationalities? IOW, can a West German supply truck resupply a US unit? There is some commonality among NATO formations in terms of equipment (example: British L7 cannon used on M1, M60 and Leo 1).

2) Does a captured supply unit give the captor any benefit other than denying said supplies to the enemy?