Scotland, England's junior partner in the United Kingdom since 1707, will decide Thursday whether to become independent once again. The referendum and the issues.
Q: What will voters consider exactly?
A: The question on the ballot is: "Should Scotland be an independent country?"
Q: How did a seemingly fruitful union reach the breaking point?
A: Prime Minister David Cameron insisted on a vote in a deal in 2012, excluding a third option of giving the Scots more autonomy — which he is now offering anyway.
Q: Who's who?
A: The pro-independence campaign is led by Alex Salmond, whose Scottish National Party won an unexpected majority in the Scottish Parliament in 2011.
The anti-independence camp, which calls itself Better Together, is a coalition of British political parties.