He was called up for military service in 1941 and served in the 2NZEF infantry .
Gretton served in World War II and appears on the World War II Nominal Rolls 1939 -- 1948 .
Gretton was called up for military service in 1941 and served in the 2NZEF infantry .
Gretton served in World War II and appears on the World War II Nominal Rolls 1939 -- 1948 .