Historical clue formulations

• ___ Terr., area from 1861 to 1889 — 2025-05-28
• ___ Terr., 1861-89 — 2020-01-04
• ___ Terr., 1861-89 — 2019-09-08
• ___ Terr. (geographical designation until 1889) — 2019-03-07
• Abbr. in two state names — 2013-08-06
• Abbr. after N. or S. — 2011-08-25
• ___ Terr., 1861-89 — 2010-01-14
• Former U.S. terr. — 2007-01-14
• U.S. terr., 1861-89 — 2003-12-11
• Old terr. west of Minnesota — 2000-04-17
• Old terr. — 1999-08-08
• Terr. until 1889 — 1996-07-07
• Wild West terr. — 1995-07-28