Roy, Archie. All Evil Shed Away
Divergence: 1940 CE
What if: Churchill was assassinated in June 1940 and an armistice followed, then invasion and occupation.
Summary: In our 1945, two officers find a manuscript written by a time traveler from occupied Britain 1970 who decided to set things right.
Published: Long 1970; World 1972; and Apogee 1986 (1869935020).