entry date to france

[hagar]

Hi:
I have been researching my grandfathers war experience - I opened the topic (on this board) Brighouse Token of appreciation.  Have found out a lot through the efforts of the people there and thought that I could get some more info.  I uploaded his medal card (along with 5 other harry barracloughs) I know that he arrived in France on May 13/ 1915 and was part of the RFA - can anyone tell me more info - how do I find what unit he went with? etc

thanks for any info
Jim Barraclough