Historical clue formulations

• ___ One (presidential helicopter) — 2026-04-26
• Saltwater — 2025-03-02
• Shade of deep blue — 2020-07-10
• Almost any major character in "Sands of Iwo Jima" — 2020-01-17
• One serving on a ship — 2019-10-13
• Leatherneck — 2019-09-24
• Jarhead — 2017-02-14
• U.S.S. Nautilus, for one — 2016-02-24
• Kind of biology — 2016-02-06
• ___ One (president's helicopter) — 2015-01-29
• One of "the Few, the Proud" — 2013-12-18
• Jarhead — 2010-12-20
• "Battle Cry" soldier — 2009-11-05
• Devil dog — 2008-12-05
• Corps member — 2005-09-18
• Corps member — 2004-08-19
• Corps member — 2004-04-05
• Leatherneck — 2003-03-28
• Soldier in Uris's "Battle Cry" — 2003-02-23
• Devil dog — 2003-01-02
• Kind of geology — 2002-11-01
• Not terrestrial, perhaps — 2001-03-03
• Leatherneck — 1999-12-19
• "Semper fidelis" person — 1999-06-28
• Thalassic — 1995-01-20
• _____ Corps — 1994-07-06