Jephthah, the son of a harlot is cast out by the "real family" of Gilead, but the elders come crawling back when they need a mighty warrior to defeat the evil Ammon.
Jephthath (just rolls off the tongue doesn't it.) makes a deal with The LORD to insure victory but it comes at a pretty steep price. His virginal, only daughter with no name is to become a burnt offering.
She's OK with the idea as long as she can still go on spring break before she becomes a burnt offering.
The Gileadites kill thousands of Ephraimites when they can't pronounce Shibboleth correctly. I'm sure I would have died by the edge of their sword if they asked me!
BTW, why is it important that the sons, daughters and nephews of the leaders rode on ass colts?
Why is this important information but we never learn what the Israelites do to piss off God repeatedly?