Our study aims to put under scrutiny the Algerian army tasks and roles through different periods of time and this requires going back to the roots when the national liberation army was established, returning to the present as the army has become the institution protecting the state. An institution which has an everlasting organic relation with politics, embodying one of its central tasks. The study needs to highlight the above cited issues in its attempt to grasp and understand the army role during the 1992s' political crisis, and in so doing a particular attention is given to the ways how the army dealt with the crisis and what is the nature of its contribution in tackling and facing it. Finally, the study is concerned with the army role in the near future from a prospective approach.