Libertarian historical observances

Let's note two anniversaries today

1. The Battle of Warsaw, 1920, in which the Polish Army halted the Soviet Army in its march towards Germany. If the Polish Army had failed here, Soviet communism could have become the primary form of government in Europe, and who knows what else from there?

2. Uruguay's Independence Day, 1825. They became independent from Spain but were subdued afterwards by the Empire of Brazil, eventually regaining their independence. Libertad o Muerte!