As the political dust settles, it’s likely that in MOD main building, and others along Whitehall, there will be a lot of people saying ‘we are where we are’, and pausing to take stock of where to go next.
They will want answers quickly, but will have to show patience.
If the step is toward a no-deal Brexit that would mean upheaval.
For defence, the biggest concern would probably be economic because currency turmoil presents a big threat to the defence budget.
In fact, there is a good chance that defence would be relied upon by the government, through NATO and bilateral relationships, to help maintain ties that are strained in other areas.
Military operations should largely be unaffected, with the exception of bureaucratic questions about continued British contribution to current EU military missions, most notably the anti-piracy Operation Atalanta.
The political will for continued British contribution has certainly been strong on both sides up to this point.
What this latest Brexit twist really means for defence is what it means for the country as a whole; uncertainty.
That’s never welcome and it will be met with appeals for calm heads and strategic thinking.