Today the Scottish government set out its case for Scotland to be independent from the rest of the UK.
On 18 September 2014, Scottish voters will be asked "should Scotland be an independent country?" and will have to choose "yes" or "no".
Scotland has been part of the UK for more than 300 years and the vote could change the shape of the UK forever.
Martin has been chatting to the BBC's Scotland correspondent Laura Bicker to find out more.