I'm trying to trace the military service of my grandfather, on my mother's side. All we know is that he served (and survived) WW1, he was born in Leeds (about 19 years old in 1914), and he served in a Yorkshire regiment. I need some advice, as most of the sites I go on charge for the information, and I could spend a lot of money, chasing details for the wrong person. All help is appreciated. There is so little I know about him.