The term YANKS' FOES refers to the opponents of the New York Yankees baseball team. The crossword solutions for this term are REBS (4 letters), JAYS (4 letters) and BOSOX (5 letters). The REBS stands for the Confederate States of America, which was a group of 11 southern states that seceded from the United States during the American Civil War. The JAYS stands for the Toronto Blue Jays, a professional baseball team based in Toronto, Canada. The BOSOX stands for the Boston Red Sox, a professional baseball team based in Boston, Massachusetts.