Watch the supply depot for a week, learning the schedules of the guards.
Hit this supply depot at 4 AM, when only a token guard will be awake protecting the depot. 6 regulars and 12 recruits will slip into the place at night, silently killing the guards and silencing them before alarms can be raised. Hopefully we can kill them all before they make noise and turn this into a protracted firefight. If it DOES turn into a firefight... well, that’s why we have assault rifles.
We will ambush the soviets in the streets of urban New Jersey. Our IMVs will, driven by two recruits, block the streets in front and behind of the soviet convoy. Meanwhile, our people will have hidden on the roofs and in the rooms of the various buildings lining this street. We all know how tough street fighting is, and the advantage tends to the people hiding and striking from those hidden positions. After we’ve rescued the prisoners, see if we can claim the IMVs. IF we can, sell them to fund our operations. If we can’t, torch them. This mission will use our full force, armed with assault rifles.
(This likely won’t happen, but: If possible, have a couple people at street level, hidden, looking for an opportunity to sneak into the prison convoy to free the prisoners while we’re fighting, providing them with the means to help their own rescue.)