The answer is: Ammonites

1 Samuel 11:1

Ah, the saga of Jabesh-Gilead! If you journey back to 1 Samuel 11, you’ll find the Ammonites knocking on the door of this significant town with downright hostile intentions. Their leader, Nahash, was not just a brute but a particular menace—his name even means "snake," which paints a fitting picture of his character.

When the Ammonites lay siege, the residents of Jabesh-Gilead found themselves in a terrible bind. They even sought terms of peace, famously stating, "Make a treaty with us, and we will serve you." Most compelling here is how it showcases the tension and fear in ancient Israel as they grappled with external threats. Having just experienced the bitter fate of upheaval and political flux following the rise of Saul—Israel’s first king—a united front was vital for survival in such trying times.

Remember, Jabesh-Gilead plays an intriguing role beyond this infamous siege, echoing throughout Israel’s history. The town was also known for the tragic circumstances surrounding King Saul's death; his body was hung on the city’s wall, prompting loyal citizens to bravely retrieve it, showcasing the depth of loyalty and tribal relationships prevalent during that era.

So, in this narrative, you’ll see bravery, the unyielding pursuit of peace, and the life-and-death stakes of community survival all woven together in a rich tapestry that illustrates the complex relationships and loyalties played out in ancient Israel.