Estrada Cabrera was forced to accept the new party due to the internal and international pressure. On March 1, 1920, the National Assembly officially accepted the new party. Since then, Estrada Cabrera publicly admitted his willingness to accept the international opinion on opening spaces for political rivals, but kept arresting Unionist sympathizers. On 11 March 1920, the new party organized a large demonstration against the government, but the army fired against it causing a lot of resentment and anger and united the Guatemalan people against the President. B.