One group of Ethiopians only agreed to leave on the insurance that they would
end up together in the same city.
leave on上网查有“让…留在原处“的意思，
请问这里的 leave on the insurance 要怎么翻呢？
还有would这里是“宁愿“的意思吗？
感谢~~

leave + on the insurance that [子句]意思是 on the promise that [子句]不过此情况通常用assurance而非insurance

用 assurance +1

谢谢大家~所以是：其中一群依索比亚人只同意在“最终能聚集于同一城巿”的保证下才愿意离开