Timeline April 1864

Events in April 1864 4

• 1863 – 1864 January Uprising Revolt against Russia The longest Polish insurgency against the Russian Empire during the partition era.
• 1864 Pasteur demonstrates germ theory Sorbonne lecture challenges spontaneous generation Louis Pasteur presented experimental results at the Sorbonne showing that microorganisms causing fermentation and putrefaction came from the air rather than arising spontaneously. The work laid crucial groundwork for germ theory and antiseptic medicine.
• 1864 Chincha Islands War begins Spain seizes guano-rich islands from Peru Spanish forces occupied Peru's guano-rich Chincha Islands in a dispute rooted in unresolved colonial-era debts, triggering a war that would eventually draw in Chile, Bolivia, and Ecuador. The islands were a major source of valuable fertilizer export revenue.
• 1864 Battle of Dybbøl Loss of Schleswig A traumatic military defeat by Prussia that resulted in Denmark losing a third of its territory.