The liberation of Patras by the French expeditionary force occurred during the Greek War of Independence, which aimed to free Greece from Ottoman rule. The campaign was coordinated by General Maison, who sought to demonstrate France's support for the Greek revolutionaries fighting for their sovereignty. Patras, strategically located on the western coast of the Peloponnese, had suffered under Ottoman governance, and its liberation was essential for both military and symbolic reasons. The liberation was executed effectively after careful planning, and the French troops entered the city amidst enthusiastic cheers from the local populace. This moment was not only a tactical victory but also an emotional uplift for Greeks, reinforcing their resolve to continue their struggle for independence.

The French expeditionary force deployed significant naval and ground troops to the region, and its operation in Patras was marked by collaboration with local Greek forces who had been engaged in battles against the Ottomans for several years. The liberation served to strengthen Franco-Greek relations, with the French emerging as key allies in the Greek fight for independence. Following the liberation of Patras, the French continued their operations in the region to assist the Greeks and push back Ottoman forces, further shaping the course of the war.

The campaign culminated in the gradual withdrawal of Ottoman forces from the Peloponnese and facilitated the eventual recognition of Greek independence. The significance of this victory extended beyond the immediate military achievements, highlighting the complex international dynamics of the era, as global powers like France became directly involved in local conflicts to promote their interests and ideals retrospectively while encouraging nationalist movements throughout Europe.