Usage patterns
〈事〉で陣営が分かれるfor camps/factions to split over an issue
The camps split over that bill.
〈人〉の陣営に加わるto join someone's camp/faction
He joined the opposition's camp.
陣営を組むto form an alliance or camp
The two parties formed a camp for the election.
〈場所〉に陣営を敷くto set up a military camp at a place
The army set up camp at the foot of the mountain.