Historical clue formulations

• *It's west of Okinawa — 2017-12-07
• Borneo borderer — 2011-05-22
• Sight from Taiwan — 2009-06-10
• Taiwan's setting — 2008-12-14
• Taiwan is in it — 2001-07-04
• Taiwan is in it: 2 wds. — 1999-06-06
• Waters off Hong Kong — 1997-11-27