... set out in an army vehicle. (Para. 3)
Meaning: ... started the journey by riding in an army vehicle
set out: start a journey.
This phrase can be replaced by "set forth" or "set off".
They set off in search of the lost child. 他們出發去尋找失蹤的小孩。
n. 短語,習語,個人風格,樂句
vt. 措詞