Question: G.A.R. Memorial Hall, also known as the Algona Schoolhouse, is a historic building located in Algona, Iowa, because of declining numbers, the local G.A.R. Post gave the building to Hagg Post No. 90 of which U.S. wartime veterans organization formed in Paris, on February 16, 1919, by three officers of the American Expeditionary Forces (AEF) ?

Context paragraphs:
G.A.R. Memorial Hall: G.A.R. Memorial Hall is a historic multi-purpose community hall located at Hunt in Livingston County, New York.  It was built about 1880 as home to the local chapter of the Grand Army of the Republic.  It is a 1-story, three-by-three-bay brick structure with a gable roof.

Memorial Building (Topeka, Kansas): Memorial Building, also known as G.A.R. Memorial Hall, is a historic Grand Army of the Republic hall located at 120 West 10th Avenue, in Topeka, Kansas, United States.  On July 17, 1975, the building was added to the National Register of Historic Places.

Memorial Hall (Rockford, Illinois): Memorial Hall, also known as Soldiers and Sailors Memorial Hall and Veterans Memorial Hall, is located in Rockford, Illinois.  It was built from 1901 to 1903, and originally was dedicated to those who served in the Civil War and the Spanish–American War.  It is said to be the first of its kind in the United States.  It is located on the west side of Rockford, one block from the Rock River, across the street from the Rockford Public Library, formerly the Carnegie Library.  Although it was initially conceived to honor just those from Winnebago County, Illinois who served in the American Civil War, supporters added a listing of county Spanish–American War veterans before building was begun.  Other Winnebago County veterans were later memorialized inside and outside the Hall.  The Memorial is one of the few veteran's memorials that is not a monument.  The building is administered by the Winnebago County Board and was dedicated on June 3, 1903 by President Theodore Roosevelt.

G.A.R. Hall and Museum: The G.A.R. Hall and Museum is a historic museum at 58 Andrew Street in Lynn, Massachusetts.  The four story brick building was built for the local outpost of the Grand Army of the Republic, an American Civil War veterans organization, in 1885.  It has two storefronts on the ground floor, offices on the second floor, and a large meeting hall on the upper two floors.  The roofline originally had ornate brick crenellations, but these were removed in the mid 20th century.  The first two floors have also been altered over time, but the meeting hall remains in nearly original condition.  With declining membership in the organization, the building was turned over to the city, which operates it as a museum.

J.D. Craven Women's Relief Corps Hall: The J.D. Craven Women's Relief Corps Hall is a historic building located in Macksburg, Iowa, United States.  The J. D. Craven Post #198 of the Grand Army of the Republic (GAR) was organized in 1883.  They organized an auxiliary, the J.D. Craven Post #322 of the Women's Relief Corps (WRC), in 1898.  They built this two-story frame building in 1901 with donated labor and lumber.  It is a rare example of a vaulted roof commercial building.  In addition to the functions of the WRC, the building has also served as a community building.  It also housed the local public school during the 1920-21 school year when their new building was under construction.  The WRC continued in existence, even after the GAR folded.  When the hall was nominated for National Register of Historic Places, the J.D. Craven Post was still in existence.  It was the only one left in Madison County, and one of 34 in Iowa at that time.  They added seasonal assistance to the elderly to their aid for veterans.  The building was listed on the National Register in 1984.

G.A.R. Memorial Hall (Algona, Iowa): G.A.R. Memorial Hall, also known as the Algona Schoolhouse, is a historic building located in Algona, Iowa, United States.  It was built as the city's first schoolhouse in 1867, and moved to this location in 1887.  The two-story frame Italianate structure features a gable roof, bracketed eaves, and wood lap siding.  It originally had a belfry in the center of the roof, but it was removed at some point.  After the building was moved it was used by the James C. Taylor Post No. 165 of the Grand Army of the Republic (G.A.R.), which had been organized in 1883.  During the G.A.R.'s ownership the first floor was used as a library from 1899-1904.  Because of declining numbers, the local G.A.R. Post gave the building to Hagg Post No. 90 of the American Legion Post in 1919 who used it for their clubhouse until 1967.  At that time the Kossuth County Historical Society acquired the building, and they use it for a museum.  It was listed on the National Register of Historic Places in 2014.

American Expeditionary Forces: The American Expeditionary Forces (AEF) was the expeditionary force of the United States Army during World War I.  It was established on July 5, 1917, in France under the command of General John J. Pershing.  During the United States campaigns in World War I it fought alongside the French Army, British Army, and Canadian Army on the Western Front, against the German Empire.  A minority of the AEF troops also fought alongside the Italian Army in that same year, against the Austro-Hungarian Army.  The AEF helped the French Army on the Western Front during the Aisne Offensive (at the Battle of Château-Thierry (1918) and Battle of Belleau Wood) in the summer of 1918, and the AEF fought its major actions in the Battle of Saint-Mihiel and the Meuse-Argonne Offensive in the latter part of 1918.

Lothrop Memorial Building-G.A.R. Hall: The Lothrop Memorial Building-G.A.R. Hall is an historic building located at 95 Washington Street in Taunton, Massachusetts.  It was originally built in 1888 as the First Presbyterian Church, on land purchased from Marcus Morton, and now houses professional offices.  It was for many years home to the William H. Bartlett GAR Post No. 3 of the Grand Army of the Republic, a veterans organization, which ran the building as a community center.  It was added to the National Register of Historic Places in 1984.

Memorial Building (Dyersville, Iowa): Memorial Building, also known as Dyersville City Hall, is a historic building located in Dyersville, Iowa, United States.  When this structure was completed in 1929 it housed the following functions: police department, fire department, municipal offices, post office, library, community hall, and gymnasium.  It replaced the 1893 city hall at the same location that housed all those functions except the library and gymnasium.  Its function as a veteran's memorial was overseen by the American Legion, which also was initially located here.  The Legion, fire station and post office have subsequently relocated to other facilities.  The previous city hall had been damaged in a fire in 1928.  The Waterloo, Iowa architectural firm of Ralston and Ralston designed the two-story brick Colonial Revival style building to replace it.  Raymond Klass of Louisburg, Wisconsin was the contractor who built the new structure.  The building was completed on December 12, 1929 for just over $40,000.  It was listed on the National Register of Historic Places in 2013.

American Legion: The American Legion, Inc., is a U.S. wartime veterans organization formed in Paris, on February 16, 1919, by three officers of the American Expeditionary Forces (AEF) The American Legion was chartered by the U.S. Congress on September 16, 1919.  It is headquartered in Indianapolis, Indiana, and has a legislative office in Washington, D.C. The Legion played the leading role in the drafting and passing of the Servicemen's Readjustment Act of 1944, otherwise known as, the "GI Bill."

Supporting paragraphs: G.A.R. Memorial Hall (Algona, Iowa) American Legion
Answer: American Legion