Short answers, pulled from the story.
The French expedition to Sardinia was a short military campaign fought in 1793, the first offensive by the new French Republic in the Mediterranean during the War of the First Coalition. It failed after attacks on Cagliari in the south and La Maddalena in the north were both defeated.
The campaign ran through 1793. Truguet's fleet reached Cagliari on the 21st of December 1792, the second attack on the town came on the 22nd of January 1793, and the last French garrison on Sardinia surrendered on the 25th of May 1793.
Counter-admiral Laurent Jean François Truguet commanded the French Mediterranean Squadron and led the operation under instructions from the National Convention. He was recalled to Paris after the defeat and temporarily replaced by Trogoff de Kerlessy.
Delays in assembling the invasion force let the Sardinians raise an army of more than 4,000 infantry and 6,000 cavalry before the French arrived. Repeated storms scattered Truguet's fleet, and Sardinian shore batteries and counter-attacks defeated the landings at Cagliari and Quartu Sant'Elena.
Napoleon Bonaparte served as second-in-command of the Corsican force sent against La Maddalena, marking his first military service. The attack collapsed after a reported mutiny led Colonna Cesari to withdraw, forcing Napoleon's men to abandon their cannon during the retreat.
The failed campaign triggered popular revolts in Sardinia against Savoyard rule and a temporary breakaway of Corsica from France under Pasquale Paoli. It also fed a rebellion at the French naval base of Toulon, which let British and Spanish forces occupy the port and destroy much of the French Mediterranean Squadron.