You need to be 16 years old to join the armed forces. It is possible to begin the selection process when you're still 15 and then join on your 16th birthday - the selection process normally takes about three months but can take longer or as little as one month.

If you're under 18 then your parents/guardians would need to sign your application form for you to start the selection process.  They would then have to sign another form at the end of the selection process giving you permission to join up.

If you're 18 or over you wouldn't need your parents'/guardians' permission. However, it is a good idea for your parents to come with you every time you visit the recruitment office - they can help you to ask the right questions and ask a few of their own. If you don't want your parents with you then take another adult you trust.

The maximum age for joining the navy is normally 37; for the marines it is 33.

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