In 1831 and 1848, Giuseppe Mazzini had sought to bring together the fragmented Italy as a united nation by forming secret society called Young Italy.
He failed in his attempts on both the counts and had to go underground.
The conservative regime seized this opportunity and took the responsibility to unite Italy.
The ruler of Sardinia-Piedmont assigned this responsibility to its chief minister Cavour.
Cavour used his French speaking skills to forge a Diplomatic and military alliance with France and captured the northern part of Italy in 1859 which was under the rule of Austrian Hadsburg Empire.
He was joined by the armed volunteers of Giuseppe Garibaldi and marched into the south .
They together drew out the Spain forces from Kingdom of Two Sicilies.
Following the success, King Victor Emmanuel II was proclaimed the King of united Italy in 1861.