TASK DEFINITION: Classify the relation of question with context to one of these categories: 1) award received, 2) based on, collection, 3) conflict, 4) constellation, 5) convicted of, 6) date of death, 7) director, 8) drafted by, 9) educated at, 10) medical condition, 11) military branch, 12) narrative location, 13) occupation, 14) original network, 15) parent company, 16) point in time, 17) production company, 18) residence, 19) series, 20) service entry, 21) sex or gender, 22) spouse, 23) standards body question.
PROBLEM: Context : Henry J. Muller, Jr. (born 1917) is a retired American soldier who served during World War II in the United States Army with the 11th Airborne Division between 1944 and 1945. 
Question : What war or battle involved Henry J. Muller?

SOLUTION: conflict

PROBLEM: Context : The Gewehr 98 (abbreviated G98, Gew 98 or M98) is a German bolt-action Mauser rifle firing cartridges from a 5-round internal clip-loaded magazine that was the German service rifle from 1898 to 1935, when it was replaced by the Karabiner 98k. 
Question : What year did Gewehr 98 come into use?

SOLUTION: service entry

PROBLEM: Context : William C. Arthur (4 July 1830 -- 15 November 1886) was a Royal Navy officer who was the namesake of the English name for Lüshunkou, Port Arthur, which changed hands between China, Imperial Russia, Japan, and the Soviet Union between 1894 and 1945. 
Question : What military branch did William C. Arthur belong to?

SOLUTION:
military branch