Historical clue formulations

• Leaves the union — 2017-07-18
• Leaves the union — 2013-04-15
• Leaves the country — 2006-05-20
• Pulls out — 2004-11-05
• Withdraws — 2003-05-27
• Breaks away — 2000-07-09
• Breaks away — 2000-02-11
• Withdraws — 1997-08-03