On January 27, 2006, the United Nations observed the first International Holocaust Remembrance Day. The day honors victims and survivors of the Holocaust, the systemic campaign of murder carried out by the Nazi government in the 1930s and 1940s.
 
Millions of people were killed in the Holocaust. As much as a third of Europe’s Jewish population was killed. Roma (sometimes called Gypsy) populations were targeted. The Nazis’ so-called “T-4” program targeted disabled people. Members of the gay, lesbian, bisexual, and transgender community were targeted. People and communities were also targeted for their beliefs: political dissidents, Jehovah’s Witnesses, communists, and union leaders.
 
Millions of victims were killed in concentration camps, such as Dachau, Germany; Bergen-Belsen, Germany; and Belzec, Poland. International Holocaust Remembrance Day honors the day troops from the Soviet Union liberated the largest concentration/extermination camp, in Auschwitz-Birkenau, Poland. 
campaign
Noun

activities designed to achieve a social, political, or military goal.

communist
Noun

person or group of people who support communism, a type of economy where all property, including land, factories and companies, is held by the government.

concentration camp
Noun

enclosed, guarded area where political prisoners are kept. Concentration camps are most associated with Nazi work and extermination camps during World War II.

dissident
Noun

someone who disagrees with public opinion or authority.

extermination
Noun

targeted killing of a group of things.

government
Noun

system or order of a nation, state, or other political unit.

Holocaust
Noun

(1933-1945) attempted genocide of the Jews of Europe, led by Nazi Germany. Also called the Shoah and the Final Solution.

Jewish
Adjective

having to do with the religion or culture of people tracing their ancestry to the ancient Middle East and the spiritual leaders Abraham, Isaac, and Jacob.

liberate
Verb

to set free.

murder
Verb

to kill a person.

Nazi
noun, adjective

(1919-1945) (Nationalsozialistische Deutsche Arbeiterpartei) having to do with the National Socialist German Workers' Party.

observe
Verb

to watch.

population
Noun

total number of people or organisms in a particular area.

Roma
Noun

minority group native to Central and Eastern Europe and Turkey.

Soviet Union
Noun

(1922-1991) large northern Eurasian nation that had a communist government. Also called the Union of Soviet Socialist Republics, or the USSR.

systemic
Adjective

having to do with complex, related sets of information and interactions.

target
Verb

to establish something as a goal or aim.

troop
Noun

a soldier.

union
Noun
organization of workers formed to protect the rights and interests of its members.
United Nations
Noun

international organization that works for peace, security and cooperation.