Did the British call in their army? They took great pains to stress that they would not. There is no comparison between maintaining order in the cities of a sovereign state and doing so on territory that the world agrees is NOT part of a sovereign state, using an army that claims to be one of DEFENCE, to attack it and keep its unprotected inhabitants subjugated.
U.S., allies conduct 31 air strikes in Syria and Iraq against ISIS militants (Reuters)
from the article: Learning from London, preparing for September