Historical clue formulations

• Despotic ruler of 68-Across, once — 2023-09-07
• W.W. II moniker — 2017-03-05
• Political title of the 1930s-'40s — 2013-12-08
• W.W. II title — 2011-08-28
• Axis leader — 2009-06-28
• W.W. II nickname — 2007-10-21
• Axis nickname — 2006-03-18