Dashed left edge = started before April 1858 ·
Dashed right edge = ongoing beyond April 1858
Events in April 1858 2
1858Utah War ends peacefullyStandoff between Mormon settlers and the US Army concludes without major battleFollowing a tense military standoff over federal authority in Utah Territory, negotiations led by Thomas Kane produced a peaceful resolution. President Buchanan issued a general pardon to Mormon settlers who had resisted federal officials, and US Army troops subsequently marched through an evacuated Salt Lake City without conflict. Alfred Cumming replaced Brigham Young as the territory's governor.
1858 – 1947Max PlanckFather of Quantum TheoryWinner of the Nobel Prize for his work on quantum mechanics and the Planck constant.