 Complete the following phrase:  Inspired and led by José Gervasio Artigas, it proclaimed independence from the Spanish Crown in 1815 and sent provincial delegates to the Congress of Tucumán with instructions regarding the nonnegotiable objective of declaring full independence for the United Provinces of the Río de la Plata and establishing a confederation of provinces, all of them on equal footing and the government of each being directly accountable to its peoples by direct democratic means of government. The delegates from these provinces were rejected on formalities from the Congress that 