Historical clue formulations

• Initiate, as a campaign — 2024-08-02
• Get on — 2024-02-21
• Organize, as a campaign — 2023-09-03
• Start of many volcano names — 2020-07-15
• Knight's need — 2020-02-08
• Increase — 2019-08-04
• Increase — 2018-03-11
• Get on one's high horse? — 2016-11-06
• Put up, in a way — 2013-05-16
• Go up — 2012-01-29
• Everest or Kilimanjaro — 2008-07-14
• Climb onto — 2007-06-26
• Build up — 2005-12-17
• Develop — 2004-07-09
• Everest or Ararat — 2004-06-28
• Hop on — 2003-09-11
• Everest, for one — 2001-05-07
• Trigger, to Roy Rogers — 2001-03-27
• ___ Rushmore — 1999-12-06
• Riding horse — 1999-06-30
• Organize, as an exhibit — 1997-04-02
• Jockey's ride — 1995-08-23
• Rushmore is one — 1995-06-23
• Get on — 1995-01-18