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.
Saudi-led planes hit Houthi-controlled government buildings (Reuters)
from the article: Learning from London, preparing for September