The Piedmontese Republic had been declared on…
December 1798 CE
The kingdom had suffered a first French invasion in 1796, which had led to the Treaty of Paris and the loss of Savoy and Nice under the disadvantageous Treaty of Paris (1796) with the French Republic, giving the French army free passage through Piedmont.
After a second invasion in 1798, King Charles Emmanuel IV had escaped to Rome, but he has never agreed to sign a new peace treaty, approving a final arrangement of its continental territories according to international law.
On December 6, 1798, the French under Joubert occupy Turin and force Charles Emanuel to abdicate all his territories on the Italian mainland and to withdraw to the island of Sardinia, which stays out of the reach of the French army.