The First 'Ndrangheta war was an internal struggle in the 'Ndrangheta, a Mafia-type criminal organisation in Calabria. The conflict raged from 1974 to 1977 and resulted in approximately 233 deaths. The war broke the equilibrium in the triumvirate, made up of Antonio Macrì, Domenico Tripodo and Girolamo Piromalli, that had ruled the 'Ndrangheta for 15 years, and facilitated the rise of a new generation 'Ndranghetisti, in particular the De Stefano 'ndrina, who wanted to involve the 'Ndrangheta in new, more lucrative criminal activities.

The 'Ndrangheta is an Italian Mafia-type association based in the peninsular region of Calabria and dating back to the 19th century. Although loosely structured, it is considered one of the most powerful organized crime groups in the world. It is characterized by a horizontal structure made up of autonomous clans known as 'ndrine, based almost exclusively on blood ties. Since the 1950s, following wide-scale emigration from Calabria, 'Ndrangheta clans dispersed to other European countries, Australia and the Americas. Currently, its main activity is drug trafficking, but it also deals with arms trafficking, money laundering, racketeering, extortion, and loan sharking.