Al-Tanzim, Al-Tanzym or At-Tanzim (Arabic: حركة المقاومة اللبنانية - التنظيم, lit. 'The Organization') was the name of an ultranationalist 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.

Source:

Wikipedia