Historical clue formulations

• Formerly the largest country in Africa, but since 2011 the third-largest — 2022-07-05
• Country that lost a quarter of its territory in 2011 — 2019-06-13
• Darfur's locale — 2018-12-12
• Egypt's southern neighbor — 2015-07-06
• - — 2014-10-09
• Country that split in two in 2011 — 2013-12-06
• Nubian Desert locale — 2009-05-31
• Arab League member — 2008-08-15
• Khartoum's land — 2007-04-09
• Arab League member — 2006-11-04
• Africa's largest country — 2006-03-26
• Red Sea borderer — 2005-09-09
• Africa's largest country — 2002-05-29
• Africa's largest country — 2001-08-21
• Where the Blue Nile and White Nile meet — 2001-07-03
• Largest country in Africa — 2000-04-18
• Red Sea republic — 1998-06-13
• Khartoum's land — 1998-05-12
• Khartoum is its capital — 1998-03-16
• Land south of Egypt — 1998-03-02
• Khartoum's country — 1998-03-01
• Nubian Desert site — 1997-09-05
• Africa's largest nation — 1997-08-20
• Red Sea nation — 1997-04-27
• Neighbor of Uganda — 1997-01-02
• Nubian Desert locale — 1996-08-25
• Red Sea borderer — 1995-03-31
• Nubian Desert locale — 1994-10-30
• Khartoum's land — 1994-09-28