▁Pear l ▁Har bor ▁resulted ▁in ▁the ▁American ▁entry ▁into ▁World ▁War ▁II , ▁it ▁was ▁converted ▁into ▁the ▁ 6 6 th ▁T ank ▁Dest roy er ▁Battalion ▁on ▁ 3 0 ▁January ▁ 1 9 4 2 . ▁The ▁ 6 6 th ▁was ▁dis band ed ▁on ▁ 1 1 ▁November ▁ 1 9 4 4 . ▁ ▁Command ers ▁ ▁The ▁following ▁served ▁in ▁the ▁position ▁of ▁Commander : ▁▁ 1 9 1 8 ▁Colonel ▁John ▁J . ▁Bon if ace ▁▁ 1 9 1 8 ▁Colonel ▁Hugh ▁D . ▁Ber keley ▁▁ 1 9 2 1 – 1 9 2 2 ▁Lieutenant ▁Colonel ▁El mer ▁J . ▁Kings bury ▁▁ 1 9 2 2 – 1 9 2 6 ▁Colonel ▁Jos iah ▁L . ▁Re ese ▁▁ 1 9 2 6 ▁Colonel ▁Jean ▁H . ▁A . ▁Day ▁▁ 1 9 2 7 – 1 9 3 0 ▁Colonel ▁Jos iah ▁L . ▁Re ese ▁▁ 1 9 3 0 – 1 9 4 1 ▁Colonel ▁George ▁H . ▁Ch err ington ▁▁ 1 9 4 1 ▁Lieutenant ▁Colonel ▁John ▁H . ▁Sch enk el ▁ ▁Her ald ry ▁ ▁The ▁ 3 0 8 th ▁Caval ry ' s ▁coat ▁of ▁arms ▁was ▁approved ▁on ▁ 9 ▁July ▁ 1 9 2 5 , ▁and ▁its ▁distinct ive ▁unit ▁ins ign ia ▁was ▁approved ▁on ▁ 1 3 ▁March ▁ 1 9 2 6 . ▁Both ▁were ▁res c ind ed ▁on ▁ 1 7 ▁February ▁