At the end of the operations, having been promoted to major, he was transferred to the military garrison of Zara as battalion commander, serving under Giovanni Messe, who praised his qualities.

[1][2][4][3] He returned to Italy before the country entered World War II on 10 June 1940, after which he distinguished himself at the command of the 5th Bersaglieri Regiment of the 131st Armoured Division Centauro on the Greek-Albanian front, where he was promoted to brigadier general on the field.

In 1941 he was appointed deputy commander of the 3rd Cavalry Division Principe Amedeo Duca d'Aosta, participating in the fighting on the Eastern Front with the Italian Expeditionary Corps in Russia.

Solinas rejected the demand, and threatened that if the Germans did not return a checkpoint they had seized by 10 pm, he would ordered to open fire on a Wehrmacht column on the Via Ostiense.

[1][2][4][3] After the end of the war Solinas was arrested by the partisans of the "Matteotti" Brigades, and on 11 July 1945 he was sentenced by the Extraordinary Court of Assize of Milan to twenty years in prison for collaborationism, for having joined the RSI and accepted the regional command of Lombardy.