The battle saw two Habsburg Austrian columns under the overall direction of Johann Peter Beaulieu attack a reinforced French brigade under Jean-Baptiste Cervoni. After a skirmish lasting several hours, the Austrians forced Cervoni to withdraw west along the coast to Savona. In the spring of 1796, Beaulieu was installed as the new commander of the combined armies of Austria and the Kingdom of Sardinia-Piedmont in northwest Italy. His opposite number was also new to the job of army commander. Napoleon Bonaparte arrived from Paris to direct the French Army of Italy. Bonaparte immediately began planning an offensive, but Beaulieu struck first by launching an attack against Cervoni's somewhat overextended force.

The French won the battle, which was fought near the village of Cairo Montenotte in the Kingdom of Piedmont-Sardinia. On 11 April, Argenteau led 3,700 men in several assaults against a French mountaintop redoubt but failed to take it. By the morning of the 12th, Bonaparte concentrated large forces against Argenteau's now-outnumbered troops. The strongest French push came from the direction of the mountaintop redoubt, but a second force fell on the weak Austrian right flank and overwhelmed it. In its hasty retreat from the field, Argenteau's force lost heavily and was badly disorganized. This attack against the boundary between the Austrian and Sardinian armies threatened to sever the link between the two allies.

After successfully defeating the Austrian right wing at the Battle of Montenotte, Napoleon Bonaparte continued with his plan to separate the Austrian army of General Johann Beaulieu from the army of the Kingdom of Piedmont-Sardinia led by General Michelangelo Colli. By taking the defences at Dego, the French would control the only road by which the two armies could link with each other. The town's defences comprised both a castle on a bluff and earthworks on rising ground, and were held by a small mixed force, consisting of units of both the Austrian and Piedmont-Sardinian armies. The Second Battle of Dego was fought on 14 and 15 April 1796 during the French Revolutionary Wars between French forces and Austro-Sardinian forces. The French victory resulted in driving the Austrians northeast, away from their Piedmontese allies. Soon after, Bonaparte launched his army in a relentless westward drive against Colli's Austro-Sardinian forces.

The French victory at the Battle of Mondovì meant that they had put the Ligurian Alps behind them, while the plains of Piedmont lay before them. A week later, King Victor Amadeus III sued for peace, taking his kingdom out of the First Coalition. The defeat of their Sardinian ally wrecked the Austrian Habsburg strategy and led to the loss of northwest Italy to the First French Republic. According to historian Gunther E. Rothenberg, Bonaparte's forces lost 600 killed and wounded out of 17,500. The Piedmontese lost 8 cannons and 1,600 men killed, wounded, and captured out of 13,000.

The Battle of Lodi was not a decisive engagement since the Austrian army had successfully escaped. But it became a central element in the Napoleonic legend and, according to Napoleon himself, contributed to convincing him that he was superior to other generals and that his destiny would lead him to achieve great things. The French took Milan afterwards.

In early May, Bonaparte's French army won the battles of Fombio and Lodi and overran the Austrian province of Lombardy. Beaulieu evacuated Milan except for a 2,000-man garrison that he left in the citadel. In mid-May, the French occupied Milan and Brescia. At this time, the army had to pause to put down a revolt in Pavia. At the village of Binasco, the French atrociously massacred the adult male population. Beaulieu pulled his army back behind the Mincio, with strong patrols west of the river. He urgently tried to put the fortress of Mantua into a state where it could sustain a siege. This action compelled the Austrian army to retreat north up the Adige valley to Trento, leaving the fortress of Mantua to be besieged by the French.

Castiglione was the first attempt by the Austrian army to break the French Siege of Mantua, which was the primary Austrian fortress in northern Italy. To achieve this goal, Wurmser planned to lead four converging columns against the French. It succeeded insofar as Bonaparte lifted the siege in order to have the manpower sufficient to meet the threat. But his skill and the speed of his troops' march allowed the French army commander to keep the Austrian columns separated and defeat each in detail over a period of about one week. Although the final flank attack was prematurely delivered, it nevertheless resulted in a victory. The outnumbered Austrians were defeated and driven back along a line of hills to the river crossing at Borghetto, where they retired beyond the Mincio River. This battle was one of four famous victories won by Bonaparte during the War of the First Coalition, part of the Wars of the French Revolution. The others were Bassano, Arcole, and Rivoli.

In September, Bonaparte marched north against Trento in Tyrol, but Wurmser had already marched toward Mantua by the Brenta River valley, leaving Paul Davidovich's force to hold off the French. The action was fought during the second relief of the siege of Mantua. The Austrians left Davidovich's corps in the upper Adige valley while transferring two divisions to Bassano del Grappa by marching east, then south down the Brenta River valley. The Austrian army commander Dagobert von Würmser planned to march south-west from Bassano to Mantua, completing the clockwise manoeuvre. Meanwhile, Davidovich would threaten a descent from the north to distract the French. Bonaparte's next move did not conform to the Austrians' expectations. The French commander advanced north with three divisions, a force that greatly outnumbered Davidovich. The French steadily pressed back the Austrian defenders all day and routed them in the afternoon. Davidovich retreated well to the north. This success allowed Bonaparte to follow Würmser down the Brenta valley to Bassano and, ultimately, trap him inside the walls of Mantua.

The first relief of Mantua failed at the battles of Lonato and Castiglione in early August. The defeat caused Wurmser to retreat north up the Adige River valley. Meanwhile, the French reinvested the Austrian garrison of Mantua. Ordered by Emperor Francis II to relieve Mantua at once, Feldmarschall Wurmser and his new chief-of-staff Feldmarschall Franz von Lauer drew up a strategy. Leaving Paul Davidovich and 13,700 soldiers to defend Trento and the approaches to the County of Tyrol, Wurmser directed two divisions east then south down the Brenta valley. When he joined the large division of Johann Mészáros at Bassano, he would have 20,000 men. From Bassano, Wurmser would move on Mantua, while Davidovich probed the enemy defenses from the north, looking for a favorable opportunity to support his superior. Napoleon followed Wurmser down the Brenta valley. The engagement occurred during the second Austrian attempt to raise the siege of Mantua. It was a French victory. The Austrians abandoned their artillery and baggage, losing supplies, cannons, and battle standards to the French. Wurmser elected to march for Mantua with a large portion of his surviving troops. The Austrians evaded Bonaparte's attempts to intercept them but were driven into the city after a pitched battle on 15 September. This left nearly 30,000 Austrians trapped in the fortress. This number rapidly diminished due to disease, combat losses, and hunger.

Bonaparte badly underestimated Davidovich's strength. To oppose the northern thrust, he deployed a division of 10,500 soldiers under General of Division Vaubois. The start of Davidovich's offensive led to a series of clashes beginning on 27 October. On 2 November the French attacked the Austrians at Cembra. Although Vaubois inflicted 1,100 casualties on his enemies at the cost of only 650 Frenchmen, he decided to pull back to Calliano when Davidovich resumed his forward movement the next day. The clashes ended with the defeat of the French, who were forced to a temporary retreat, and were one of the few successes obtained by the imperial troops against the Napoleonic ones.

The Battle of Calliano on 6 and 7 November 1796 saw an Austrian corps commanded by Paul Davidovich rout a French division directed by Claude Belgrand de Vaubois. The engagement was part of the third Austrian attempt to relieve the French siege of Mantua.

The Austrians sent yet another army under József Alvinczi against Bonaparte in November. Again the Austrians divided their effort, sending Davidovich's corps from the north while Alvinczi's main body attacked from the east. The Austrians repulsed persistent French attacks in a struggle in which both sides suffered heavy losses. The engagement, which happened two months after the more famous Battle of Bassano, marked the first tactical defeat of Bonaparte's career.

In the Battle of Caldiero on 12 November 1796, the Habsburg army led by József Alvinczi fought a First French Republic army commanded by Napoleon Bonaparte. The French assaulted the Austrian positions, which were initially held by the army advance guard under Prince Friedrich Franz Xaver of Hohenzollern-Hechingen. The defenders held firm until reinforcements arrived in the afternoon to push back the French. This marked a rare tactical setback for Bonaparte, whose forces withdrew into Verona that evening after having suffered greater losses than their adversaries.

The battle saw a bold maneuver by Napoleon Bonaparte's French Army of Italy to outflank the Austrian army led by József Alvinczi and cut off its line of retreat. The French victory proved to be a highly significant event during the third Austrian attempt to lift the siege of Mantua. Alvinczi planned to execute a two-pronged offensive against Bonaparte's army. The Austrian commander ordered Paul Davidovich to advance south along the Adige River valley with one corps while Alvinczi led the main army in an advance from the east. The Austrians hoped to raise the siege of Mantua where Dagobert Sigmund von Wurmser was trapped with a large garrison. If the two Austrian columns linked up and if Wurmser's troops were released, French prospects were grim. Davidovich scored a victory against Claude-Henri Belgrand de Vaubois at Calliano and threatened Verona from the north. Meanwhile, Alvinczi repulsed one attack by Bonaparte at Bassano and advanced almost to the gates of Verona where he defeated a second French attack at Caldiero. Leaving Vaubois' battered division to contain Davidovich, Bonaparte massed every available man and tried to turn Alvinczi's left flank by crossing the Adige. For two days the French assaulted the stoutly defended Austrian position at Arcole without success. Their persistent attacks finally forced Alvinczi to withdraw on the third day. That day Davidovich routed Vaubois, but it was too late. Bonaparte's victory at Arcole permitted him to concentrate against Davidovich and chase him up the Adige valley. Left alone, Alvinczi threatened Verona again. But without his colleague's support, the Austrian commander was too weak to continue the campaign and he withdrew again. Wurmser attempted a breakout, but his effort came too late in the campaign and had no effect on the result. The third relief attempt failed by the narrowest of margins.

The Battle of Rivoli was a key victory in the French campaign in Italy against Austria. Napoleon Bonaparte's 23,000 Frenchmen defeated an attack of 28,000 Austrians under General of the Artillery Jozsef Alvinczi, ending Austria's fourth and final attempt to relieve the siege of Mantua. Rivoli further demonstrated Napoleon's brilliance as a military commander and led to the French consolidation of northern Italy.

The French invaded the Papal States, motivated by the killing of French general Mathurin-Léonard Duphot in December 1797. After the successful invasion, the Papal States became a satellite state renamed the Roman Republic, under the leadership of Louis-Alexandre Berthier, one of Bonaparte's generals. It was placed under the government of France - the Directory - and comprised territory conquered from the Papal States. Pope Pius VI was taken prisoner, escorted out of Rome on 20 February 1798 and exiled to France, where he would later die.

In the battle, three divisions of a First French Republic army commanded by Napoleon Bonaparte attacked several columns of the retreating Habsburg Austrian army led by Archduke Charles, Duke of Teschen. In three days of confused fighting, French divisions directed by André Masséna, Jean Joseph Guieu, and Jean-Mathieu-Philibert Sérurier succeeded in blocking the Tarvis Pass and capturing 3,500 Austrians led by Adam Bajalics von Bajahaza.

The Treaty of Leoben was a general armistice and preliminary peace agreement between the Holy Roman Empire and the First French Republic that ended the War of the First Coalition. It was signed at Eggenwaldsches Gartenhaus, near Leoben, on 18 April 1797 by General Maximilian von Merveldt and the Marquis of Gallo on behalf of the Emperor Francis II and by General Napoléon Bonaparte on behalf of the French Directory. Ratifications were exchanged in Montebello on 24 May, and the treaty came into effect immediately.

Key findings:

Bonaparte's campaign was important in bringing an end to the War of the First Coalition.