The following points may help you:
a. Pinochet’s military rule came to end with a referendum which he held in 1988.
b. People voted against his rule and wanted to restore democracy.
c. Political freedom was restored.
d. Since then Chile had Presidential elections where political parties have participated.
e. Gradually role of military rulers in politics have been eliminated and democracy has been established.
f.In the presidential elections of 2006, Michelle Bacheletwas elected President of Chile
