Historical clue formulations

• Forcibly oppose — 2018-11-25
• With 35-Down, Korea in the 1950s or Iraq in the 2000s — 2015-12-26
• Clash — 2015-04-23
• Knock-down-drag-out — 2013-10-18
• Clash — 2013-08-11
• Fight — 2012-07-29
• Military engagement — 2008-09-10
• More than a scrap — 2005-09-08
• Fight it out — 2004-10-19
• Source of some scars — 2003-11-08
• General effort? — 2003-08-29
• Make war — 1997-09-01
• Kind of plan — 1997-05-31
• Engagement — 1997-01-02
• Fray — 1994-03-23