Logistics behind Hannibal's crossing of the Alps

Do historians know much about the logistics behind Hannibal’s crossing of the Alps? More specifically, did he have a supply train backing up his campaign, or did his men obtain supplies through pillage of the land that they crossed?

Bonus question: how long could a modern military force (let’s say a US army battalion) operate continuously without outside logistics support?

How far did the German army get in the Battle of the Bulge before they ran out of gas?

That doesn’t exactly answer either question, does it?

As I recall, at least one of the Roman writers writing about Hannibal’s campaign had a detailed write-up of exactly how he accomplished it. I remember translating that during second-year Latin.

I don’t have any cites, but since nobody else has answered I will give it a try. AFAIK he relied on locals who were either dissatisfied with Rome and would lend them assistance, or were loyal and subsequently got pillaged.
An army unit would do very poorly under those conditions. I think only days. Maybe weeks if the fighting was not too heavy and they knew to conserve supplies.

One of the few reasons to have a marine corps in modern times is that they can operated as self contained units. A MEU brings its own logistics and would do much better.

Of course, special operations are designed to operate completely behind enemy lines, without even the benefit of bringing dedicated logistics stuff with them. They might use supply airdrops and such, though.

Here is some published academic research on “THE CAMPAIGNS OF HANNIBAL AND SCIPIO”

www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA398480 This is a pdf.

How modern? General Sherman marched into the South with his army and pillaged and lived very well off the land for a couple of months, IIRC.

It would depend on how hostile the locals were and what resources were available there. Napoleon did badly in Spain because the locals were so hostile. Troops had to be guarded at all times and farmers did their best to stop them from taking their produce. Wellington, on the other hand, had a friendly populace and a policy of paying for supplies; as well as a supply line back to the UK.

Drop your “US army battalion” into Israel and they could keep going for a long time; drop them into Libya and they wouldn’t last very long at all.

Do the communication lines that provide the backing for a credit card count as a “supply line” that we’re trying to cut?

Granted, even without that, an officer could still write out an IOU on paper, which a merchant might be persuaded to accept, but it’s a lot easier with the credit card.