This paper highlights the role of the armed forces and their impact on the process of political transition, and discusses civil-military relations in their various aspects: the state, society and the armed forces per se, in order to reveal the main pillars that constitute a balance between the power of political institutions (legislative and executive) and the military power of the army. Such a balance would lead to the subduing of the army to the civil authority, and confine military activities to security and defense. The paper focuses on the common characteristics shared by states that have succeeded in building democratic armies. To conclude, the author presents a set of recommendations addressed to activists and democrats, on what ought to be done and what should be avoided in the security-defense field during the process of democratic army building.