The Chalisa famine of 1783–84 in South Asia follows unusual El Niño events that began in 1780 and caused droughts throughout the region.

Chalisa (literally, "of the fortieth" in Hindustani) refers to the Vikram Samvat calendar year 1840 (1783).

The famine affects many parts of North India, especially the Delhi territories, present-day Uttar Pradesh, Eastern Punjab, Rajputana, and Kashmir, then all ruled by different Indian rulers.

The Chalisa is preceded by a famine in the previous year, 1782–83, in South India, including Madras City and surrounding areas (under British East India Company rule) and in the extended Kingdom of Mysore (under the rule of Haider Ali and Tipu Sultan).

Together the two famines may have depopulated many regions of India, including, for example, seventeen per cent of the villages in the Sirkali region of present-day Tamil Nadu, sixty per cent of the villages in the middle Doab of present-day Uttar Pradesh, and over thirty per cent of the villages in the regions around Delhi.

It is thought that up to eleven million people may have died in the two famines.

Laki emits an estimated one hundred and twenty million long tons of sulfur dioxide, about three times the total annual European industrial output in 2006 (but delivered to higher altitudes, hence more persistent), and equivalent to six times the total 1991 Mount Pinatubo eruption.

This outpouring of sulfur dioxide during unusual weather conditions causes a thick haze to spread across western Europe, resulting in many thousands of deaths throughout the remainder of 1783 and the winter of 1784.

A major Aleut revolt occurs on Amchitka in May 1784.

According to what Aleut people tell the Japanese castaways, otters have been decreasing year by year and their share in return for the furs is also decreasing as Russian ships stop coming to the island.

The castaways feel that the people have a sense of crisis in their situation.

There have been some negotiations with higher-ranking Aleut people about necessities that the Russians had run out of and that they had given to Aleuts in return for furs.

Two Russians, Stepano and Kazhimov, by Nevizimov's order, kill the chieftain's daughter and Nevizimov's mistress, Oniishin, because Russians had doubted Oniishin’s loyalty to them.

Hundreds of Aleuts start gathering on a mountain that evening and march to the Russians' houses.

Five Russians open fire, and the Aleuts flee, regrouping in another attempted attack the next day.

Yelling, they move more quickly towards the houses, but start to run away again as the Russians open fire.

The Russians, noticing that all the men are absent from the village and are discussing their strategy on a mountain, take hostage around forty women and children hostage.

The Aleuts surrender.

Four high-ranking Aleut people are executed by the Russians.

The Aleuts begin to move after the incident from Amchitka to neighboring islands.

The leader of the Russians, Nevizimov, is jailed after the incident is reported to Russian officials.

Spanish presidios had been established by 1782 at San Diego, Monterey, San Francisco and Santa Barbara, linked by a series of mission stations along the coast.

The center of Russian activity shifts east to Kodiak Island in 1784 and hunting operations are extended into Cook Inlet.

The two empires seem destined to clash, but before direct Russian-Spanish contact is made new powers appear on the Northwest Coast—Britain and the United States.

Famine continues in Japan as three hundred thousand die of starvation.

Germany and other Central European nations report severe flood damage during the spring thaw of 1784.

The emancipation of the Jews has endowed the Habsburg empire's cultural life with new vitality within a short time.

Transylvanian serfs under Ion Ursu, having persuaded themselves that they have the emperor's support, rebel in 1784 against their feudal masters, sack castles and manor houses, and murder about one hundred nobles.

Joseph orders the revolt repressed but grants amnesty to all participants except Ursu and other leaders, whom the nobles torture and put to death before peasants who had been brought to witness the execution.

Aiming to strike at the rebellion's root causes, Joseph emancipates the serfs, annuls Transylvania's constitution, dissolves the Union of Three Nations, and decrees German the official language of the empire.

The Italian adventurer Alessandro Cagliostro, whose history is shrouded in rumor, propaganda, and mysticism, moves in 1784 from Bordeaux to Lyon to found the Mother Lodge of Egyptian Masonry.

David paints his famous Oath of the Horatii, in Rome, 1784.

In this piece, the artist references Enlightenment values while alluding to Rousseau's social contract.

The republican ideal of the general will becomes the focus of the painting with all three sons positioned in compliance with the father.

The Oath between the characters can be read as an act of unification of men to the binding of the state.

The issue of gender roles also becomes apparent in this piece, as the women in Horatii greatly contrast the group of brothers.

David depicts the father with his back to the women, shutting them out of the oath making ritual; they also appear to be smaller in scale than the male figures.

The masculine virility and discipline displayed by the men's rigid and confident stances is also severely contrasted to the slouching, swooning female softness created in the other half of the composition.

Here we see the clear division of male-female attributes that confined the sexes to specific roles under Rousseau's popularized doctrine of "separate spheres".

These revolutionary ideals are also apparent in the Distribution of Eagles.

While Oath of the Horatii and The Tennis Court Oath stress the importance of masculine self-sacrifice for one's country and patriotism, the Distribution of Eagles will ask for self-sacrifice for one's Emperor (Napoleon) and the importance of battlefield glory.