The activities of military institutions and the gradual militarization of the political process have become a serious challenge to many emerging democracies in Africa, including Nigeria. Although Nigeria reverted to civilian rule in 1999, the continued deployment of military forces in its political processes has raised concerns about the gradual militarization of political environments with grave implications for democratic development. The paper examined the nexus between militarization of political processes and democratic fragility in Africa, focusing on how the increasing involvement of military institutions and armed youths in electoral processes and internal political affairs undermines democratic institutions and political stability in Nigeria. Using a descriptive research design, qualitative analysis, and the theory of civil-military relations to explain the dynamics between military institutions and civilian political authority, the paper argued that the increasing incursion of military elements into the political process in Africa undermines constitutional rule, restricts political participation, and erodes public trust in democratic institutions. The paper also posits that weak civilian oversight, politicization of security institutions, and persistent security challenges create opportunities for military actors to exert political influence. The study concluded that strengthening democracy in Nigeria requires reinforcing civilian control over the military, improving institutional accountability, and promoting democratic norms that limit military involvement in political processes. The paper recommended, among others, that the demilitarization of electoral security architecture, reforming political party financing and security sector patronage, strengthen civilian oversight of defense and security.