1880. Foundation of San Justo

3 March commemorates the official foundation of the town of San Justo in 1880. According to historical records, its establishment was promoted by Dolores Costa de Urquiza, widow of General Justo José de Urquiza, and approved by the government of the Province of Entre Ríos. The settlement grew around the Palacio San José, the general’s former residence, as part of the agricultural colonization that transformed the region in the late nineteenth century.

1878. Setting up a de jure autonomous Bulgarian principality. Third Bulgarian state.

The Treaty of San Stefano was signed on 3 March 1878, setting up a de jure autonomous Bulgarian principality on the territories of the Second Bulgarian Empire. The Great Powers immediately rejected the treaty out of fear that such a large country in the Balkans might threaten their interests. The subsequent Treaty of Berlin provided for a much smaller state comprising Moesia and the region of Sofia, leaving large populations of Bulgarians outside the new country. This played a significant role in forming Bulgaria's militaristic approach to foreign affairs during the first half of the 20th century. The Bulgarian principality won a war against Serbia and incorporated the semi-autonomous Ottoman territory of Eastern Rumelia in 1885, proclaiming itself an independent state on 22 September 1908.

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1983. The town regained its independence.

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1942. Le Pecq was bombed by mistake.

The Royal Air Force bombed the Renault factory in Boulogne-Billancourt on the night of 3 to 4 March, following an error in aviation, they bomb the city of Pecq causing the loss of 47 civilians.

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