Despite this, the armed conflict was brief, mostly because the Zapatistas, unlike many other guerilla movements, did not try to gain traditional political power. It focused more on trying to manipulate public opinion in order to obtain concessions from the government. This has linked the Zapatistas to other indigenous and identity-politics movements that arose in the late-20th century. The main concession that the group received was the San Andrés Accords (1996), also known as the Law on Indian Rights and Culture. The Accords appear to grant certain indigenous zones autonomy, but this is against the Mexican constitution, so its legitimacy has been questioned. Zapatista declarations since the mid-1990s have called for a new constitution. the government had not found a solution to this problem. The revolt also pressed the government to institute anti-poverty programs such as "Progresa" (later called "Oportunidades") and the "Puebla-Panama Plan" – aiming to increase trade between southern Mexico and Central America.