Benito Mssolini was one of closest ally of Hitler and nazi Germany. Altough Italy was clearly victorious on Europe during WW2, him had just watch fall of colonial empire in Italy. Some archive records prove that Mssolini planned invasion to Egypt but Hitler made clearly that there he would be alone so Mussolini focused only to Balkans.
Altough Mussolini enacted harsh antisemitic legistature he never hand Italian Jews to Germans. Mussolini had too plans for change Italy as republic but these attempts were total failures. He too tried make massive reconstruction works around Italy which led to serious economy troubles.
Mussolini died suddenly from heart attack in 1953. There is some rumors about poisoning but for such claims are not proven. Mussolini wsa buried to his mausoleum in center of Rome. That has been target of controversy years after Hot War but in 1987 Italian government ordered his remnants to be removed from his mausoleum and Mussolini was re-buried to his birth town Predappio.
Ugo Cavallero had notable career on Italian army during Mussolini's regime. In 1940's he was some time under Mussolini's disfavor, probably due his failure on save Italian Libya. He anyway later managed to climb back to Mussolini's favor. After Mussolin's death in 1953 there was power struggle but Cavallero managed to win that. Whilst the struggle some fsacists like Farinacci were purged from fascist party and for example Farinacci found two new holes on his head.
During Hot War phase Cavallero tried defend Italy against Allies but eventually Allies managed to land to mainland Italy. In 1958 Cavallero had begun secret negotiations with Allies. Details are still under dusk but it is assumed that king Umberto II, leadeship of Catholic Church and some moderate fascists like Grandi and Galeazzo talked the duce take steps towards peace. On Decmeber 5, 1958 Italy announced unconditional surrending. Cavallero stepped down and king Umberto II called provisional government.
Cavallero was later sentenced to prison for war crimes to life sentence but was released already in 1962 due high age, poor health and good behave on prison. Cavallero died in 1965 from heart attack.
Umberto II became king of Italy in 1947. Mussolini tried soon after his ascension abolish monarchy but that was total failure. There has been some rumors Umberto II being long-time anti-fascist. Most of Hot War he remained quiet invisible and non-important person. There is anyway some evidence that he might had helped secretly some underground anti-fascist movements. During Hot War the king was even futher against fascist regime and the war. There is not public records about details but with support of Catholic Church Umberto II managed to speak government begin peace talks with Allies. After official surrending of Italy Umberto II established provisional government under occupation forces of Allies led by lord Louis Mountbatten, uncle of Duke of Edinburgh. PG helped transfer Italy to democracy. There was too some spaks over abolition of monarchy but for that wasn't much of public support, probably due the king's role on ending of war in Italy and his strong support for transition to democracy.
Rest of the king's reign saw recovery of Italy and full democratisation of the country. Umberto II was quiet popular king. He died in 1983 in Rome.