Switzerland sounds like the most likely.
In Britain, it's voluntary, and there are two kinds of military; The Regulars and the Territorials.
The Regulars are... well... your regular force of professional soldiers. Basic Training takes 6 months, and after that you are officially a soldier and get your first hat. After that, you either go directly into your duties, or into more specialist training in order to get a fancier hat. The colour and fanciness of the hats donate your area of expertise and occasionally your rank in the army. You also get the right to take out the badass Redcoat for weddings and such.
The Territorials are part-time soldiers. Think of a militia, and you've got it: people who train during the time they're not working. There are TA posiitions for a good wide section of the army, but more important and specialist roles are off-limits.
Now, it used to be that the TA would only provide support to the Regular, but after the government decide to hack a great chunk of the military budget, that's all changed. They want the TA to be taking a more active role, and decided to force this through by eating a large portion of the forces. Thousands of jobs were lost, most soldiers falling downwards into the TA.
So, oddly, it's very hard to get into the armed forces at the moment, because they aren't recruiting... which is I think a first in British history.
I have a friend in Isreal who is currently 2 years into his 4-year compulsory service, and he hates it because he was forced into it. While I'm currently trying my hardest to get into the army here.