At the approach of Brion, La Torre evacuated Angostura and was soon afterwards obliged by hunger to abandon Guayana Vieja, the last position held by the Royalists in Guayana. The remnant of his army, which now numbered only 600 men, he embarked on 32 vessels and gained the open sea in safety.
Piar, though he had recognized the authority of Bolívar, was in his heart disaffected and entered into a conspiracy with Mariño to restrict his authority by the appointment of a Junta of War; he also gained over Arismendi to his views. Bolívar prudently quelled this attempt at sedition by counsels and threats conveyed privately to the conspirators. Piar, in alarm, asked leave to withdraw from the army on pretext of illness, and retired to Upata, where he continued his intrigues till Bolívar wrote a friendly letter to him asking him to desist. He then fled to Maturin and concerted with Mariño a plan of independent action.
The position of Bolívar was now one of great danger; the troops of the army of Guayana were for the most part men of colour, Piar was very popular with them, and was accused of an intention to produce among them a mutiny of race. Bolívar gave orders to Cedeño to arrest Piar. The negro chieftain made no resistance, and was brought to Angostura for trial by a court-martial, under the presidency of Brion. He was sentenced to death for disobedience, sedition, and desertion.
Bolívar confirmed the sentence and he was shot in the great square of Angostura on the 16th October, 1817, dying as bravely as he had lived. If not an act of justice, this execution was warranted by necessity. It was the only means of preventing a civil war, which would have ended in the destruction of the army.
Mariño was still in arms at Cumaná with 400 men. Bolívar sent Bermudez with his corps to arrest him. Bermudez being an old friend of Mariño's, procured his banishment. Bolívar was now rid of opposition, but still his power was far from being well consolidated.
