2. Communism is a social, political and economic ideology that aims at the establishment of a classless, moneyless, stateless and socialist society structured upon common ownership of the means of production. This movement, in its Marxist-Leninist interpretations, significantly influenced the history of the 20th century, which saw intense rivalry between the "socialist world" (socialist states ruled by Communist parties) and the "western world" (countries with market economies), culminating in the Cold War between the Eastern bloc and the "Free World".

3. The People's Commissariat for Internal Affairs was the public and secret police organization of the Soviet Union that directly executed the rule of power of the Soviets, including political repression, during the era of Joseph Stalin. The NKVD contained the regular, public police force of the USSR (including traffic police, fire fighting, border guards and archives) but is better known for the activities of the Gulag and the Main Directorate for State Security (GUGB), which eventually became the Committee for State Security (KGB). It conducted mass extrajudicial executions, ran the Gulag system of forced labour camps, suppressed underground resistance, conducted mass deportations of entire nationalities and Kulaks to unpopulated regions of the country, guarded state borders, conducted espionage and political assassinations abroad, was responsible for influencing foreign governments, and enforced Stalinist policy within communist movements in other countries

4.  The Battle of the Windmill was a battle fought in November 1838 in the aftermath of the Upper Canada Rebellion.  Loyalist forces of the Upper Canadian government defeated an invasion attempt by Hunter Patriot insurgents based in the United States.

5.  The Internationale ( L'Internationale in French) is a widely sung left- wing anthem. It has been one of the most recognizable and popular songs of the socialist movement since the late 19th century, when the Second International adopted it as its official anthem. The original French refrain of the song is C'est la lutte finale / Groupons- nous et demain / L'Internationale / Sera le genre humain. (Literally translated: "This is the final struggle / Let us group together and tomorrow / The Internationale / Will be the human race.")  The Internationale has been translated into many languages. It is often sung with the hand raised in a clenched fist salute and is sometimes followed (in English-speaking places) with a chant of "The workers united will never be defeated". The Internationale has been celebrated by socialists, communists, and anarchists.