yes just make sure it is documented in your records just incase you reinjure the knee. Also, be aware that this is a pre-existing condition and the military is not abligated if you start having issues to give you compensation.
While you are on active military duty, you CANNOT join a militia unit
Yes, the military can pay for your school. You will have to join the military and you will go to a military college but you will get a degree!
Yes he\she can
long as your fit and can past the tests
No but they can be contracted as an adviser.
If she does not posses a prior military service, no.
It depends if you can run. Say if you only have 9 toes, if you can run fine, you can join.
It is not possible for anyone to force anyone else, even a relative, to join the military. The military will only take people who agree to go. If your son refuses, the military will not take him.
No. The absence of a kidney is a medical dis-function and any branch of the Military will not accept you, sorry.
No definitely not.....
It's possible, but a lot of will depend on what you were in for.
If you have had a cranium surgery, you can join the army if the surgery did not affect your mental or physical abilities.
History of receiving organ or tissue transplantation is disqualifying per AR 40-501 Ch 2.
Whether or not you should join the military is a personal choice that nobody can make for you, even if you've been given a scholarship. Think of what you'd like to accomplish in your future and how the military would or would not fit into that plan.
That will depend on the results. If you can pass the military physical, you can join. This is probably going to be acceptable, as it is essentially like having a broken bone rather than joint replacements or surgery on a joint or major organ. Consult with a recruiter to find out what your chances are.
No you can not make any one join the millitary.
The Australians generally don't allow foreigners into their military, although around 2010 they did implement a program where they'd enlist foreigners of nations friendly to Australia if they had prior military experience.