A company of Irish soldiers was sent into the Congo in 1961. The situation turned and they were left unsupported and unreinforced. Outnumbered 20 to 1, they held out for 5 days. Forced to surrender when they ran out of ammo and water, held for a month and then sent home, they were treated like cowards afterwards.
It wasn't until 2005 that the true story came out.
They were heroes.
Here's the trailer. This one comes with a recommendation, you won't see a better movie this month.