Finch, Sheila. "If There Be Cause"
Divergence: 1578 CE
What if: Sir Francis Drake planted the seed of Protestantism among AmerInds of the Pacific Coast.
Summary: 200 years later, religious war breaks out when the Spanish begin their colonization of California.
Published: In Amazing Stories, February 1992; and What Might Have Been? Volume 4: Alternate Americas (eds. Gregory Benford and Martin H. Greenberg), q.v.