Question: Fort Leavenworth National Cemetery was named for the soldier active in what war?

Context paragraphs:
Fort Scott National Cemetery: Fort Scott National Cemetery is a United States National Cemetery located in Fort Scott, in Bourbon County, Kansas.  Administered by the United States Department of Veterans Affairs, it encompasses 21.8 acre , and as of 2014, had more than 7,000 interments.  It is one of three national cemeteries in Kansas (the other two being Fort Leavenworth and Leavenworth).

Yellowstone National Cemetery: Yellowstone National Cemetery is a United States National Cemetery located 1 mile north of Laurel, Yellowstone County, Montana, at 55 Buffalo Trail Road (state highway 532), administered by the US Department of Veterans Affairs, National Cemetery Administration.  The 10.5 acre cemetery began as a satellite cemetery of Black Hills National Cemetery; Sturgis, South Dakota.  On 18 May 2015, the Department of Veterans Affairs created five national areas of responsibility, and Fort Logan National Cemetery, Denver, Colorado, assumed supervisory responsibility for Yellowstone National Cemetery.  Yellowstone National Cemetery is the first of eight smaller national burial grounds the Department of Veterans Affairs plans in its Rural Veterans Burial Initiative for largely rural states in America. .

The Fort Leavenworth Lamp: The Fort Leavenworth Lamp is a weekly newspaper for the U.S. Army military community living in Fort Leavenworth, Kansas.  It is a civilian contract newspaper, printed by GateHouseMedia, Inc., and has a circulation varying between 8,000 to 10,000.  It serves as a record for activities on Fort Leavenworth, including the history of the U.S. Army Command and General Staff College and the U.S. Disciplinary Barracks located on the Army post.

Fort Leavenworth: Fort Leavenworth is a United States Army installation located in Leavenworth County, Kansas, immediately north of the city of Leavenworth, in the upper northeast portion of the state.  Built in 1827, it is the oldest active United States Army post west of Washington, DC, and the oldest permanent settlement in Kansas.  Fort Leavenworth has been historically known as the "Intellectual Center of the Army."

Fort Leavenworth National Cemetery: Fort Leavenworth National Cemetery is a United States National Cemetery located on Fort Leavenworth, a United States Army installation north of Leavenworth, Kansas.  It was officially established in 1862, but was used as a burial ground as early as 1844.  The cemetery is the resting place of eight Medal of Honor recipients, but most are the unknown soldiers of war.  It was named for Brigadier General Henry Leavenworth, who was re-interred there in 1902 from Woodland Cemetery in Delhi, New York.  Administered by the United States Department of Veterans Affairs, it occupies approximately 36.1 acre and was site to 22,679 interments, as of the end of 2005.  It is maintained by Leavenworth National Cemetery.

Fort Leavenworth Military Prison Cemetery: Fort Leavenworth Military Prison Cemetery (also known as the United States Disciplinary Barracks Cemetery) is a cemetery maintained by the Fort Leavenworth Military Prison, Leavenworth County, Kansas.  The purpose of this cemetery is for the burial of unclaimed bodies of soldiers who died in the United States Disciplinary Barracks.

Richard Allen Cultural Center: The Richard Allen Cultural Center opened in 1992 to highlight African-American history in Leavenworth, Kansas.  In 1992, the museum opened in the former home of U.S. Army Captain William Bly, a Buffalo Soldier during World War I.  The home is decorated to look as it would have in the early 1900s.  In 2002, an addition was built to the front of the original home to display more items teaching about African-American history in Kansas.  One display includes prints of original photographic plate negatives donated to the museum, called the Black Dignity Photos from the Mary Everhard collection.  The photographs are African-American pioneers who lived in and around the Leavenworth area from 1870s to 1920s.  Other items include military artifacts from African-American soldiers who served on Fort Leavenworth, including Colin Powell.  The Richard Allen Cultural Center also contains a Ku Klux Klan costume and photographs depicting KKK activities in Leavenworth.  One artifact is a news article discussing the public lynching of an African-American citizen of Leavenworth, Fred Alexander.  The Richard Allen Cultural Center seeks to preserve these pieces of Leavenworth, Kansas history so that they are not forgotten.

Leavenworth National Cemetery: Leavenworth National Cemetery is a United States National Cemetery located in the city of Leavenworth, Kansas.  It occupies 128.8 acre of land.  As of the end of 2005 it had 30,875 interments.  It is sometimes locally referred to as "Old Soldiers' Home".

Zachary Taylor National Cemetery: Zachary Taylor National Cemetery is a United States National Cemetery located at 4701 Brownsboro Road (US-42), in Louisville, Kentucky.  It is named for Zachary Taylor, the 12th President of the United States, who is buried there with his wife, Margaret Mackall Smith Taylor.  Zachary Taylor National Cemetery was listed in the National Register of Historic Places on November 3, 1983.  As of 2014, the cemetery has over 14,000 interments and is one of seven national cemeteries in the Commonwealth of Kentucky, and one of 112 in the United States.  Those buried at the national cemetery served in six wars: Spanish–American War, World War I, World War II, Korean War, Vietnam War, and the Persian Gulf War.

Henry Leavenworth: Henry Leavenworth (December 10, 1783 – July 21, 1834) was an American soldier active in the War of 1812 and early military expeditions against the Plains Indians.  He established Fort Leavenworth in Kansas, and also gave his name to Leavenworth, Kansas, Leavenworth County, Kansas, and the Leavenworth Penitentiary.

Supporting paragraphs: Fort Leavenworth National Cemetery Henry Leavenworth
Answer: War of 1812