The two Foreign Legion regiments took part in the war in Italy against the Austrians as a part of MacMahon's II Corps. When the Austrians declared war on Piedmont in April 1859, the 1st Foreign Regiment had been transferred to Corsica in hopes of bolstering its ranks with Corsican volunteers; by May the 1st Foreign Regiment arrived in Genoa. The 2nd Foreign Regiment arrived at Genoa in May as well having departed from Oran. A brigade was formed from the two regiments as the 1st Foreign Regiment was under-strength with only slight more than 600 men in its ranks. The Legion took part in the Battle of Magenta where the II Corps played an important part in the French victory and the Foreign Legion performed well. On June 7, 1859, the Legion forces in Italy entered the city of Milan to the delight of the Milanese. After the battle the under-strength 1st Foreign Regiment remained in Milan to recruit. Meanwhile, the 2nd Foreign Regiment took part in the French Army's two-week pursuit of the Austrians which culminated in a bloody French victory at Solferino.