See related link.
I would say that if you're Canadian, you should support your own troops by joining the Canadian military, and if you're British you should join the British Forces.
You must come to the US first then sign up
Different jobs for the US army will require different qualifications. However before joining the army you will be required to take an ASVAB to see what you meet the requirements for.
The army is for to protect the country the army's in. It's not for you, if you mean for you to join, there is certain requirements that needs to be met, like you never went to jail, or be a Canadian Citizen, etc.
What are the healthcare restrictions on joining the british army
The Canadian army makes more money so the Canadian army.
Sixteen is the minimum age for joining the Nepalese army.
Each army has its own requirements. Ask your local or regional recruiting office for more information or check their website - this is a good idea anyway if you are thinking about joining up.
The Canadian Army has never stopped.
There is an extensive list of requirements you must meet prior to joining the Navy. The Navy has a webpage dedicated to these requirements: http://www.navy.com/about/before/enlistmentstandards/#requirements
The Canadian army entered the war in 1914 The Canadian army entered the war in 1914