Jawohl

I understand this word means the following:
1. Yes, sir
2. Yes, I will do
3. Understood
4. Affirmative
5. Yup
6. Yes

Questions
Is this used even used in practice or is it mainly used in military circles?

Hallo RexV,

Jawohl is indeed much as you've described it above, and is essentially a stronger form of ja. It's a bit old-fashioned and isn't used as often nowadays; as you've guessed, it has military connotations. You may sometimes hear people say jawohl to one another, but often they'll only do so as a joke.

Tschüss!

Liss