Scotland

Military

Of the money spent on UK defence, about £3.3 billion can be attributed to Scotland as of 2013. Although Scotland has a long military tradition predating the Treaty of Union with England, its armed forces now form part of the British Armed Forces, with the notable exception of the Atholl Highlanders, Europe's only legal private army. In 2006, the infantry regiments of the Scottish Division were amalgamated to form the Royal Regiment of Scotland. Other distinctively Scottish regiments in the British Army include the Scots Guards, the Royal Scots Dragoon Guards and the Scottish Transport Regiment, a Territorial Army Regiment of the Royal Logistic Corps.

Because of their topography and perceived remoteness, parts of Scotland have housed many sensitive defence establishments, with mixed public feelings. Between 1960 and 1991, the Holy Loch was a base for the US fleet of Polaris ballistic missile submarines. Today, Her Majesty's Naval Base Clyde, 25 miles (40 kilometres) north west of Glasgow, is the base for the four Trident-armed Vanguard class ballistic missile submarines that comprise the UK's nuclear deterrent. Scapa Flow was the major Fleet base for the Royal Navy until 1956.

Two frontline Royal Air Force bases are also located in Scotland. These are RAF Leuchars and RAF Lossiemouth, the last of which is the most northerly air defence fighter base in the United Kingdom. A third, RAF Kinloss will close as an RAF unit in 2013-14. RAF Leuchars is due to be turned into an army barracks, ending the RAF's connection in Fife.

The only open-air live depleted uranium weapons test range in the British Isles is located near Dundrennan. As a result, over 7000 potentially toxic munitions lie on the seabed of the Solway Firth.