The methodology was invented during The World War II. This is specialized toward American to learn foreign languages due to the military operations.
They called it as "Army Method" that the intention is to improve communicative skill briskly in intensive oral language classes.
At present we call it as the Audiolingual Method. It is combination between behavioral psychology and some language method from linguistics
The objective of this method is mere providing students with intensive communication circumstance. The teacher give a lot of drill and repetition. Students learn how to have memorize about the structural word and sentence and respond directly. The repetition through trial and error will reshape a new language behavior and form a new language habit among the learners.
This method almost has a typical character with The Direct Method. But this method claims that uses the aspect of psychology and linguistic as the base of theory
The point as the popularity aspect is the fast result of communicative competence among learners. The proverb "practice make perfect" is a typical with this method that does not take account on the correct structure at the beginning. Students feel free to speak because error is part of learning. In order to improve the communication competence, they will get feedback afterward, drill, and repeat after it.