Original: He joined the International Workingmen's Association and was charged to conquer Italy to Marx’s ideology, in a country then under the strong influence of the Anarchism of Mikhail Bakunin and the Republicanism of Giuseppe Mazzini.
Simplified: He joined the International Workingmen's Association and was charged to go back to Italy and conquer it to Marx’s ideology, where instead there was the strong influence of the Anarchism of Mikhail Bakunin and the Republicanism of Giuseppe Mazzini.