My grandfather was born in Philadelphia but served in the Canadian armed forces in ww2. Would that make him a Canadian citizen? He was station in the UK where he met and married my British grandmother, my father was born in 1946. My grandfather travelled back to Canada when my father was young and my grandmother and father stayed in the UK. My grandfather father died in the 1970s in Windsor Ontario. Neither my father or grandmother claimed Canadian citizenship. Would I be eligible to claim? I was born in 1983, I grew up and still live in the UK.