Historical clue formulations

• Brother of Lech and Czech in Slavic lore — 2024-10-12
• U.N. Security Council permanent member: Abbr. — 2017-07-27
• St. Petersburg's home: Abbr. — 2015-01-27
• Country with a red, white and blue flag: Abbr. — 2014-10-03
• Bulg. relative — 2010-08-07
• 1904-'05 foe of Japan: Abbr. — 2007-08-26
• Birthplace of 41-Across: Abbr. — 2006-12-10
• Moscow's home: Abbr. — 2006-04-17
• U.S.S.R. state: Abbr. — 2003-11-30
• Moscow's land: Abbr. — 2003-06-23
• Ukr. neighbor — 2002-11-27
• Perennial Olympics powerhouse: Abbr. — 2002-04-14
• Big chunk of Eur. — 2001-05-09
• Land of 147 mill. — 1999-08-08
• Loser in the Seven Years' War: Abbr. — 1999-03-27
• Toys ___ — 1996-10-18
• Ukr. neighbor — 1994-04-20
• Neighbor of Ukr. — 1994-03-13