Historical clue formulations

• Northern Indiana county or its seat — 2017-07-30
• French-named city on Galveston Bay — 2007-12-23
• Indiana county or its seat — 2005-03-26
• Indiana county or its seat — 2002-04-07
• Texas city, site of the San Jacinto Monument — 2000-06-07
• Indiana town near South Bend — 1994-06-15