Simplify the following text for a Grade 10 native English-speaking person.
Original: On October 15 , 1914 , immediately after the start of the war , the ICRC set up its International Prisoners-of-War ( POW ) Agency , which had about 1,200 mostly volunteer staff members by the end of 1914 .
Simplified: On 15 October 1914 , immediately after the start of the war , the ICRC set up its International Prisoners-of-War ( POW ) Agency .