[KineticLensman]

It's the British Army, not the Royal Army, unlike the Royal Air Force and the Royal Navy, although its members do swear allegiance to the monarch. The Army's existence requires parliamentary consent, unlike the Navy and Air Force.

[Apocryphon]

Was this a post-Restoration compromise? Funny how that parliament didn't try to also get consent over the navy.

[KineticLensman]

Something like that IIRC. Unlike the Army, the Royal Navy wasn't a threat to either the King or Parliament in the civil war.