Why did the Republicans nominate John c Fremont?

The Republicans nominated John C. Frémont in 1856 as their first presidential candidate primarily due to his strong anti-slavery stance and his prominence as a military hero and explorer. Frémont's alignment with the party's platform, which opposed the expansion of slavery into the territories, resonated with northern voters. His nomination also aimed to attract diverse support, including abolitionists and former Whigs disillusioned with the Democratic Party. Additionally, Frémont's image as a visionary leader helped to galvanize the nascent Republican coalition.