What is "al-tanzim"

The Al-Tanzim, Al-Tanzym or At-Tanzim (حركة المقاومة اللبنانية - التنظيم | Arabic for “The Organization”) was the name of an ultra-nationalist secret military society and militia set up by right-wing Christian activists in Lebanon at the early 1970s, and which came to play an important role in the Lebanese Civil War.