Jack was born in 1925 in St. Paul, Minnesota.  At age seventeen Jack enlisted in the U.S. Army to show his patriotism and fight for his country in World War II.  After completing boot camp in Fort Leavenworth, Kansas and Durham, North Carolina he left for battle from Fort McCoy, Wisconsin.

Sergeant Entwistle served in Company A, 282nd combat platoon special forces, a front line combat infantry battalion which served in North Africa, England, France, Germany, Belgium and surrounding countries.

 Sergeant Entwistle was in many historic battles including the Battle of the Bulge, Black Forest, Rhineland and Central Europe Battles, Ardeeneo, and was one of the first boats to land on Normandy Beach.  Sergeant Entwistle was wounded twice, once from grenade shrapnel to both legs and the other was a bullet to the chest resulting in the loss of a lung.  Sergeant Entwistle was captured in Germany and escaped as the sole survivor from his POW group.  These battles and heroism earned Sergeant Entwistle many awards including the Purple Heart, Good Conduct Award, Two Overseas Bars, Victory Lapel Pin, American Theatre, European Theatre, and Middle Eastern Ribbons.  General Patton himself pinned three of these awards to Sergeant Entwisle to show Americans thanks for his Heroism and Patriotism.

In 1946 Sergeant Entwistle was discharged from the U.S. Army where he returned home to West St. Paul, Minnesota and resumed his job at Cudahay Meat Packing.  Jack went on to work for American Hoist as a steel worker before retiring at age sixty-two from Choban Reality as a carpenter.  After retirement Jack continued to work as a self employed carpenter and general handyman.

Jack married his life partner Juanita “Nita” Russell soon after he returned from the war.  Jack and Nita raised four children, Joyce, John Junior, Pauline and Delbert “Bud”.  Jack is also a grandfather to many grandchildren and great grand children. At age eighty-five Jack now lives in Stillwater, Minnesota.