Facing the Austrian army, on the opposite side of the river, was the Army of the Rhine, commanded by Moreau. Including the French forces in Switzerland, it numbered one hundred and thirty thousand soldiers, and extended from the St. Gothard on the right to Strasburg on the left. It had for a base of operations the frontier fortresses of France, and Switzerland, which was occupied by the French. The Austrian army in northwestern Italy consisted of one hundred and twenty thousand soldiers, and was commanded by General Melas. The greater part of it was in the vicinity of Genoa and along the Apennines and Maritime Alps. The remainder, occupying the fortresses and guarding the entrances to the passes of the Alps, was scattered throughout northwestern Italy. This army had its base of operations on the Mincio; and its line of communication was by several roads down the valley of the Po to its base, thence by two roads: one north through the Tyrol across the Brenner Pass into the valley of the Danube; the other northeast through Friuli across the Pontebba Pass to Vienna. Opposed to the army of Melas was the Army of Italy. It consisted of forty thousand soldiers, of whom thirty-six thousand, commanded by Masséna, were holding the passes of the Apennines and Maritime Alps from Genoa to the Col di Tenda. The remainder, four thousand strong, commanded by General Thurreau, was guarding the Mont Cenis Pass in the French Alps. The line of communication of the Army of Italy to its base of operations on the Rhone was by the Genoa-Nice road. A British fleet, commanded by Admiral Keith was in the Gulf of Genoa; and a British corps twelve thousand strong, commanded by General Abercromby, was at Port Mahon in Minorca. Such were the main features of the theatre of operations, and such were the positions and numbers of the opposing armies that were facing each other in Germany, France, Switzerland, and Italy, at the beginning of hostilities early in April, 1800. Against the Austrian armies, supported by the British navy, and a British corps which might at any time be thrown upon the coast of France, Bonaparte could not, with his two armies, expect to make much headway. His chances of success were small; the odds against him were too great. Unless he could increase his own forces, a French victory was doubtful. Thus it was that early in the winter he had seen the necessity of creating an army of reserve, which could be sent to re-enforce Moreau in Germany or Masséna in Italy as circumstances might require. But the Army of Reserve had not yet been assembled. The divisions composing it were still scattered throughout France. Their organization, however, was being rapidly pushed forward, with the intention that early in May they should unite near Lake Geneva and form an army of forty thousand soldiers.