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.
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Question: Context : Virtually all battles that are considered part of the 'Battle of the Border' (with the exception of the Battle of Hel, which lasted for more than a month and the Battle of Mokra, a Polish defensive victory) resulted in rapid defeat of Polish forces, which were forced to abandon the regions of Pomerania, Greater Poland and Silesia. 
Question : When did Battle of the Border occur?

Answer: point in time


Question: Context : Leon de Winter was born on 24 February 1954 in Den Bosch, in the southern Netherlands. 
Question : What was Leon de Winter's occupation?

Answer: occupation


Question: Context : George Pomutz was born in the Kingdom of Hungary crownland of the Austrian Empire, in the town of Gyula (Romanian: Giula), Békés county, to ethnic Romanian parents originally from Săcele, near Brașov in Transylvania. 
Question : What armed force was George Pomutz a part of?

Answer:
military branch