[PAR] [TLE] World War II [SEP] World War II (often abbreviated to WWII or WW2), also known as the Second World War, was a global war that lasted from 1939 to 1945, although related conflicts began earlier.  It involved the vast majority of the world's countries—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis.  It was the most widespread war in history, and directly involved more than 100 million people from over 30 countries.  In a state of total war, the major participants threw their entire economic, industrial, and scientific capabilities behind the war effort, erasing the distinction between civilian and military resources. [PAR] [TLE] Bob Callahan (American football) [SEP] Robert Francis Callahan (September 26, 1923 – March 10, 2011) was an American football player.  He was born in St. Louis, Missouri and attended Beaumont High School where he was the captain of the football and basketball teams.  He played college football as a center for the University of Missouri in 1942, but his education was interrupted by two years in the United States Marine Corps during World War II.  After being discharged from the Marines, Callahan played football as a tackle and center for the University of Michigan in 1945 and 1946.
[PAR] [TLE] World War II [ SEP ] World War II ( often abbreviated to WWII or WW2 ) , also known as the Second World War , was a global war that lasted from 1939 to 1945 , although related conflicts began earlier . It involved the vast majority of the world 's countries — including all of the great powers — eventually forming two opposing military alliances : the Allies and the Axis . It was the most widespread war in history , and directly involved more than 100 million people from over 30 countries . In a state of total war , the major participants threw their entire economic , industrial , and scientific capabilities behind the war effort , erasing the distinction between civilian and military resources . [PAR] [TLE] Bob Callahan ( American football ) [ SEP ] Robert Francis Callahan ( September 26 , 1923 – March 10 , 2011 ) was an American football player . He was born in St. Louis , Missouri and attended Beaumont High School where he was the captain of the football and basketball teams . He played college football as a center for the University of Missouri in 1942 , but his education was interrupted by two years in the United States Marine Corps during World War II . After being discharged from the Marines , Callahan played football as a tackle and center for the University of Michigan in 1945 and 1946 .
Bob Callahan was part of the war that lasted through what years?
Bob Callahan was part of the war that lasted through what years ?
1939 to 1945
1939 to 1945