John Behan and Sarah Connolly 1914

A John Behan who has a father named Richard (This may well be my Gt uncle from Westmeath) married a girl named Sarah Connolly in Athenry, Galway in 1914 ...... I know of 2 children to them John born 1916 and Sarah born 1919.

I like to know more if possible about John & Sarah, was there more children, deaths, graves, even any links to John's army record, as it is record on the 1916 birth record of his son John, that he was a ‘corporal London Irish territorial force’