The army was still enhanced up to about 80,000 on May 2, 1625, of whom about 25,000 were encamped along the supply corridor.

In the supply corridor, the foot soldiers deployed to protect the convoys.

The Serbs have campaigned for months to widen the supply corridor, which is only a few miles wide in some areas.

Hanoi was interested in Laos due only to the necessity of keeping its supply corridor to the south open.

And a peace agreement is in the works that would require the Yugoslav troops to withdraw within days, making the fight for a supply corridor seem irrelevant.

That would reinforce his forces there and help keep the supply corridor open to the army that was besieging the Mannheim garrison.

Down another set of stairs, into a supply corridor.

"I knew," he says, "that if the West put in 10,000 men to cut off our supply corridor, we Serbs would be finished."

Over the next few months, the three nations took control of Iran's oil resources and secured a supply corridor for themselves.

In 1941, the British and Soviets invaded Iran to secure a supply corridor into Russia.