US and South Korea begin joint military drills as North Korea accuses them of invasion rehearsal  The Associated PressSouth Korea, US kick off annual drills over North’s military, cyber threats  ReutersUS and South Korea begin joint military drills  POLITICO1st Armored Division Soldiers validate combat capabilities at Rodriguez Live Fire Complex  United States ArmySouth Korea and U.S. Announce Drills Against North Threats  Newsweek