What happened May 1860 AD

On 6 May 1860, Garibaldi and his cadre of about a thousand Italian volunteers, steamed from Quarto near Genoa, and, after a stop in Talamone on 11 May, landed near Marsala on the west coast of Sicily.

On May 9–10, 1860, the Illinois Republican State Convention was held in Decatur. Lincoln's followers organized a campaign team led by David Davis, Norman Judd, Leonard Swett, and Jesse DuBois, and Lincoln received his first endorsement.

On 14 May Garibaldi proclaimed himself dictator of Sicily, in the name of Victor Emmanuel. After waging various successful but hard-fought battles, Garibaldi advanced upon the Sicilian capital of Palermo, announcing his arrival by beacon-fires kindled at night.

The Battle of Calatafimi was fought on the 15 May 1860 between Giuseppe Garibaldi's volunteers and the troops of the Kingdom of the Two Sicilies at Calatafimi, Sicily, as part of the Expedition of the Thousand.

On May 18, at the Republican National Convention in Chicago, Lincoln won the nomination on the third ballot, beating candidates such as Seward and Chase. A former Democrat, Hannibal Hamlin of Maine, was nominated for vice president to balance the ticket. Lincoln's success depended on his campaign team, his reputation as a moderate on the slavery issue, and his strong support for internal improvements and the tariff.

Willem Einthoven was born in Semarang on Java in the Dutch East Indies (now Indonesia), the son of Louise Marie Mathilde Caroline (de Vogel) and Jacob Einthoven.

On 27 May the force laid siege to the Porta Termini of Palermo, while a mass uprising of street and barricade fighting broke out within the city.