职责移交 meaning in English

transfer of responsibilities

He says that happened , and the province became an insurgent stronghold again , because coalition commanders moved too quickly to withdraw their own forces at the beginning of last year and handed security responsibility to the new , and unprepared , iraqi forces
他说那些确实发生了，因为联军指挥官们在去年年初的时候撤军太快，并且将安全保障的职责移交给了新组织的还没有做好准备的饿伊拉克军队，以至于这个省又再次变成了义军据点。