Historical clue formulations

• Landlocked Balkan country — 2023-06-07
• Neighbor of Montenegro — 2022-05-02
• Neighbor of Croatia — 2019-03-25
• Country below Hungary — 2018-09-24
• Balkan country once part of Yugoslavia — 2016-11-28
• Where you might spend dinars for dinners — 2015-09-23
• Neighbor of Macedonia and Montenegro — 2010-01-26
• 1999 war site — 2009-01-18
• Belgrade's land — 2008-12-15
• The Danube flows through it — 2008-03-08
• Republic from which Montenegro gained its independence — 2007-08-28
• Independent country since June 5, 2006 — 2007-03-04
• Side in a 1999 war — 2001-05-13
• Its capital is Belgrade — 1996-10-22