Despite his distinguished if unexceptional career, from 20 July 1920 to 7 March 1925 he was relegated to a "Special Auxiliary Position", a special arrangement intended to handle the large number of officers after the end of the war. During that time, he became a member of the
Italian Fascist Party on 4 May 1921 and was promoted to colonel on 31 December 1924. 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. He remained at that post until 1 March 1928, when he was sent to command the 6th Heavy Field Artillery Regiment. 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. He then served as artillery commander of the
III Army Corps at
Milan in 1933, before being appointed acting chief of staff for the
X Army Corps at
Naples in 1934 and for the
VI Army Corps at
Bologna in 1935. 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.
Ethiopia and Albania In March 1936 he was sent to
Italian Somaliland to command the Special Infantry Division "Laghi" during the
Second Italo-Ethiopian War. There, he occupied the area of the equatorial area and defeated the Ethiopian
ras Desta Damtew. In October 1936 he became governor of the area, now the
Galla-Sidamo Governorate, as well as commander of the local Italian garrison. For his service, he was promoted to divisional general in December and received a further Military Order of Savoy. He remained at that position until 1938. His violent suppression of
Ethiopian resistance, particularly in the wake of a failed assassination attempt on Viceroy
Rodolfo Graziani in February 1937, led to him being listed as a
war criminal by the Ethiopian government, which attempted to have him extradited to Ethiopia after the
Second World War. In 1938, he returned to Rome, until 3 August as Honorary Governor of Galla-Sidamo, but in 1939, he was promoted to army corps general and sent to command the Bari Army Corps. Promoted to army corps general, he was sent in October to command first the
VII Army Corps at
Trieste and then, on 1 December, the
XXVI Army Corps, comprising the Italian garrison (
XXVI Army Corps) in
Italian-occupied Albania. Geloso remained in Albania until 6 June 1940. During his tenure, he planned for an attack on Greece, and elements of his plans were indeed used in the subsequent
Italian invasion of Greece, but it was under quite different conditions and participating forces from his plans. Although a capable organiser, he was helpless in the backroom political manoeuvring that characterized the Fascist regime. 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. ==World War II and occupation of Greece==