Can't delcare emergency

[Kpeters]

Nope, you didn;t got my point. I had a brake failure....brake failures occur while on ground so there is no way I could have called the mayday before
knowwing that the brakes would fail on me.

So im gonna re-formulate the questions:

-If I have a brake failure while on runway i won't be able to call a mayde since im already on ground. Will this reduce pilot points?

-Do I have to declare an emergency when going through a war zone even if my copilot wont report any damages.

Thank you.