Resolutely takes command of the disorganized local nationalist forces, puts together 2.500/3.500 men between soldiers, legionaries of Tercio, volunteers, soldiers of the Guardia Civil and Falange, and deals with strong decision against the Republican forces (6000 to 10,000 men) landed 10 days prior to Manacor, commanded by General Alberto Bayo, a theorist of guerrilla warfare and the future "ideal teacher" of Fidel Castro.
In reality, the Bonaccorsi murders were only 700 (or 1500, as reported by the Italian consul in the Balearic islands), but this was enough to create huge complaints from France and England (even if in Majorca the civil war deaths were in percentage only one tenth of those in continental Spain).
George Bernanos wrote about the Bonaccorsi-created Dragones de la Muerte,[4] a well-armed force of young Majorcan fighters who performed well at the battle of Porto Cristo (Manacor), but later were responsible for many murders.
[5] According to Bernanos's eyewitness report, Bonaccorsi was "well to the fore in all religious manifestations" and "was usually supported by a chaplain picked up on the spot, in army-breeches and top-boots, a white cross on his chest and pistols stuck in his belt".
[9] On 14 December 1936 – shortly after Bonaccorsi captured Ibiza with a force of 500 phalangists – the British Foreign Secretary Anthony Eden wrote a memorandum to his government in which he highlighted the possibility of Italy creating a protectorate in Majorca.
[10] Immense pressure was put on Mussolini to remove Bonaccorsi from the Balearics; consequently, in February 1937, he was promoted to "General of the Blackshirts" (Console delle Milizie fasciste) and sent to the Málaga front with the Italian Corpo Truppe Volontari.
In 1940 Bonaccorsi participated in the conquest of British Somaliland as military commander of the "Reparto Speciale Autonomo della Milizia fascista", a 300-man Italian commando unit.
in 1949 Bonaccorsi created the "Associazione Nazionale Combattenti Italiani di Spagna" (ANCIS) and in the same year applied for membership in the neofascist political party "MSI".
The Italian newspaper Il Secolo d'Italia praised him in a funeral article, which noted that he was one of the few military commanders who had received medals for combat valor from three countries (Italy, Spain and Germany).