Short answers, pulled from the story.
Joseph Goebbels, the Nazi propaganda minister, coined the term Nationalist on the 24th of July 1936. He created the name to provide a cloak of legitimacy for Nazi Germany's intervention in the conflict.
The Nationalist faction was a coalition of the Falange Española, the Carlists, and the Alfonsist monarchists. These groups shared a hatred for the Second Spanish Republic despite their deep internal suspicions and ideological differences.
The Army of Africa, garrisoned in Spanish Morocco, served as the most decorated unit of the Nationalist faction. This force included the Spanish Foreign Legion and the Regulares, with more than 13,000 Moroccan troops airlifted by 20 Junkers Ju 52 planes between July and October 1936.
Italy provided 35,000 troops known as the Corpo Truppe Volontarie, while Germany supplied tanks, aircraft, and the Condor Legion. Portugal offered logistical support and access to Lisbon, and the Holy See provided diplomatic recognition by 1938.
The Catholic Church legitimized the Nationalist cause by labeling the Republic the enemy of God and the Church. The Vatican officially recognized Franco's regime by 1938 and allowed the Nationalist pavilion to display its exhibition under the Vatican flag at an International Art Exhibition in Paris in 1937.
Franco announced a decree of unification in 1937 that merged the Falange, the Carlists, and other political movements into the Falange Española Tradicionalista y de las JONS. This decree ended the autonomy of the right-wing groups and placed all political power in the hands of Franco until his death in 1975.