jager korps grouping

[MILITARYMAN1000]

hello, this is a grouping of items for a mr Gerhard Tersteegen Sr and some of his family. he served in the first world war in the prussian jager korps (is there any information on the jager korps?). what are yalls opinions on this grouping?
thanks
john

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pictures 3 & 4

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pictures 5 & 6

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pictures 7 & 8

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pictures 9 & 10

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pictures 11 & 12

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pictures 13 & 14

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pictures 15 & 16

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pictures 17 & 18

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pictures 19 & 20

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pictures 21 & 22

[Brian L.]

Who does the EKII belong to? Not the Jaeger, Tillmann. He was born in 1868. Maybe Gerhard (his son?). The one who was a POW. It would be good if you had Gerhard's Militarpass and Soldbuch. The EK would likely be indicated in there.