Question: What year did the season containing World War Zimmerman premiere?

Context paragraphs:
2012 in mixed martial arts events: The year 2012 has seen champions retain their belt, new champions crowned and new promotions begin their campaigns.  As of March 30, 2012, the Ultimate Fighting Championship has held seven events with another fourteen so far reported to be held throughout the rest of the year.  Bellator Fighting Championship began its sixth season containing tournaments in five different weight classes.  A new Indian promotion, Super Fight League, arrived on the scene in 2012 with seven events scheduled throughout the year.

Angriff!: Angriff!  is a miniatures wargame, perhaps the first ever published using scale model micro armour.  First published in 1968 and later revised and expanded in 1972 and 1982 by R. Zimmerman & D. Myers, the game was described on its cover as a "Practical guide to World War II Wargaming rules for the HO and scale enthusiast."  From inside the rule book: "After a decade of continuous use world wide and over 20 years of continuous research and development, "ANGRIFF" still remains the most widely used set of World War II wargame rules for HO and MICRO scale miniatures."  Text is from the revised and expanded edition published in 1982.

World War Zimmerman: "World War Zimmerman" is the third episode in the seventeenth season of the American animated television series "South Park".  The 240th episode of the series overall, it premiered on Comedy Central in the United States on October 9, 2013.  The episode parodies the 2013 film "World War Z" and the George Zimmerman murder trials.  The episode was critically acclaimed, with some critics considering it one of the best episodes in the more recent seasons.

Charles X. Zimmerman: Charles X. Zimmerman (January 18, 1865 – November 14, 1926) was an American Brigadier General during World War I, businessman and politician.  He was also the vice president of the first American Football League, as well as the owner of the league's Cleveland Panthers.

Zimmermann Telegram: The Zimmermann Telegram (or Zimmermann Note or Zimmerman Cable) was a secret diplomatic communication issued from the German Foreign Office in January 1917 that proposed a military alliance between Germany and Mexico in the prior event of the United States entering World War I against Germany.  Mexico would recover Texas, Arizona and New Mexico.  The proposal was intercepted and decoded by British intelligence.  Revelation of the contents enraged American public opinion, especially after the German Foreign Secretary Arthur Zimmermann publicly admitted the telegram was genuine on March 3, and helped generate support for the United States declaration of war on Germany in April.  The decryption was described as the most significant intelligence triumph for Britain during World War I, and one of the earliest occasions on which a piece of signals intelligence influenced world events.

Leo Wrye Zimmerman: Leo Wrye Zimmerman (1924–2008) was an abstract artist who founded The Society for the Arts in Louisville and was a prolific Louisville artist for over 50 years.  His unique style combined art, philosophy, and invention.  Zimmerman was born in Timlin, Pennsylvania, but moved to and grew up in his mother's hometown of Louisville, Kentucky.  He attended Centre College in Danville, Kentucky with the intent to study medicine and follow in the footsteps of his father, Dr. Leo Zimmerman.  Shortly after his first school year, with World War II in full swing, he joined the army, worked as a medic, then in Special Services in Biarritz and Paris and determined that art was his path.  After serving honorably, and studying art while awaiting a ship home, Zimmerman returned to Louisville and won first prize in the Ashland Oil Company art contest.

South Park (season 17): The seventeenth season of the animated television series "South Park" premiered on Comedy Central on September 25, 2013 and ended on December 11, 2013.

Carl Zimmermann (news anchor): Carl G. Zimmerman (c. 1918 – April 11, 2014) was an American television journalist, news anchor and World War II war correspondent.  Zimmermann had the longest on-air broadcasting career in the history of the Milwaukee media market, having spent more than 50 years on television and radio in the Milwaukee metropolitan area.  He spent much of his television career at WITI (Channel 6).  Zimmermann joined WITI in 1959 (after a stint as an anchorman at WTVW (now WISN)) as a television reporter at the station.  In 1973 he began doing investigative reports under the consumer action series "Contact 6", in which he helped viewers who wrote or called in to the station to ask him about checking out various subjects from contract disputes to fraudulent practices (that the viewers became a victim of).  Zimmermann continued to do "Contact 6" reports until he retired in 1986 as WITI's director of communications; Tom Hooper succeeded him and continued "Contact 6" until his own retirement, followed by Katrina Cravy, who does the segment currently.  The "Milwaukee Journal Sentinel" called him the "dean of broadcast news in Milwaukee."

Kansas Army Ammunition Plant: The Kansas Army Ammunition Plant (Kansas AAP) was a 13727 acre government-owned, contractor-operated (GOCO) facility, established in 1942, located near Parsons, Kansas.  The plant produced ammunition during World War II, the Korean War, and the Vietnam War.  The plant was deactivated on March 4, 2009 as part of the Base Realignment and Closure, 2005.  The plant was last operated by Day and Zimmerman, Inc.

Stone of Remembrance: The Stone of Remembrance was designed by the British architect Sir Edwin Lutyens for the Imperial War Graves Commission (IWGC).  It was designed to commemorate the dead of World War I, to be used in IWGC war cemeteries containing 1000 or more graves, or at memorial sites commemorating more than 1000 war dead.  Hundreds were erected following World War I, and it has since been used in cemeteries containing the Commonwealth dead of World War II as well.  It is intended to commemorate those "of all faiths and none", and has been described as one of Lutyens' "most important and powerful works", with a "brooding, sentinel-like presence wherever used".

Supporting paragraphs: World War Zimmerman South Park (season 17)
Answer: 2013