The French Proclamation of the Second Republic in 1848 abolished the monarchy and slavery in French colonies.
Specifically:
1. It ended the July Monarchy of Louis Philippe I, replacing it with a republican form of government.
2. It abolished slavery in all French colonies and territories, fulfilling a key demand of abolitionists and revolutionaries.
These actions marked significant political and social changes, transitioning France from a constitutional monarchy to a republic and extending principles of liberty to its colonial subjects.