Franklin Pierce's ascent to the presidency was propelled by a combination of political skill and key events. His involvement in the Democratic Party established his political reputation, culminating in his serving in Congress and as a Major General in the Mexican-American War, where he gained recognition for his leadership. The political landscape of the 1850s, characterized by sectional tensions over slavery, positioned Pierce as a compromise candidate. His appeal as a unifier in a divided nation ultimately led to his election as the 14th President of the United States, reflecting the demands of the era.