He returned to Italy on 5 August, but he remained in command of the commissariat until April 1914, when he was appointed to the 9th Fortress Artillery Regiment.

In May he won his second Silver Medal of Military Valor for his participation in the Tenth Battle of the Isonzo in the Bosco Malo-Pod Horite area and was promoted to lieutenant-colonel on 31 May.

[3] After the armistice, he spent some time in the Tonale–Garda area, moved to the post of commandant in Padua and then joined the Rome garrison and the general staff.

[1] On his return to active duty in 1925, he was assigned to the General Secretariat of the Supreme Commission on Defence, and he left the service from February 1926.

[1][4] On 25 January 1931 he was promoted brigadier general, and in March 1931, he returned to Rome as chief of staff to the VIII Army Corps.

[1][5] On 25 November 1935, he was appointed to the highly-prestigious and sought-after post of commander of the Granatieri di Sardegna Infantry Division in Rome.

[1][5] In March 1936 he was sent to Italian Somaliland to command the Special Infantry Division "Laghi" during the Second Italo-Ethiopian War.

After disagreeing with Foreign Minister Galeazzo Ciano, Mussolini's heir-apparent, during a discussion of a possible war with Greece on 23 April 1941, he was replaced by Sebastiano Visconti Prasca.

The Greeks naturally resented him as the commander-in-chief of the Italian occupation forces and the brutality that he displayed in anti-partisan operations.

However, the Italians' German allies considered him too "weak" and ineffective despite his reputation as a loyal adherent to the Axis alliance.

[1] On the other hand, Geloso in spring 1943 approved the institution of collective punishment against the civilian population in retaliation for partisan attacks, including measures such as "aerial bombardment and heavy artillery fire", the "pillaging of their food supplies", and "the deportation to concentration camps of the village chiefs and all of the men who made up the community council".

The appointment came as a result of the worsening situation on the North African Front, which made an Allied landing in Greece increasingly likely.

Geloso vehemently refused to consider that and, in a later meeting, counter proposed for any additional German forces in Greece to be placed under his command.

[1] An Italian investigation, headed by Admiral Domenico Cavagnari, into his tenure in Greece ended up absolving him of all charges brought against him for malpractice and corruption.