Question: Who commands the mounted force of the United States today?

Context paragraphs:
Environmental movement in the United States: In the United States today, the organized environmental movement is represented by a wide range of organizations sometimes called non-governmental organizations or NGOs.  These organizations exist on local, national, and international scales.  Environmental NGOs vary widely in political views and in the amount they seek to influence the environmental policy of the United States and other governments.  The environmental movement today consists of both large national groups and also many smaller local groups with local concerns.  Some resemble the old U.S. conservation movement - whose modern expression is The Nature Conservancy, Audubon Society and National Geographic Society - American organizations with a worldwide influence.

Avalanche (Kings Dominion): Avalanche is a bobsled roller coaster at Kings Dominion in Doswell, Virginia, United States.  Avalanche opened in 1988 and is the only Mack bobsled coaster running in the United States today.  It is located in the Safari Village section of the amusement park.  There are seven cars per train and the various cars are themed after Olympic bobsleds that represent five countries.  The countries include France, the United States, Germany, Switzerland, and Canada.  Each car has its country specific WInter Olympic decals.

William &amp; Mary Law School: The Marshall–Wythe School of Law at the College of William & Mary, commonly referred to as William & Mary Law School, is the oldest law school in the United States.  Located in Williamsburg, Virginia, it is a part of the College of William & Mary, the second oldest college and first university in the United States.  The Law School maintains an enrollment of about 650 students seeking the juris doctor, the fundamental legal degree in the United States today.

1st Cavalry Division (United States): The 1st Cavalry Division ("First Team") is a combined arms division and is one of the most decorated combat divisions of the United States Army, as well as the other four branches of the U.S. military.  It is based at Fort Hood, Texas.  It was formed in 1921 and served during World War II, the Korean War, the Vietnam War, the Persian Gulf War, with the Stabilization Force in Bosnia-Herzegovina, in the Iraq War, in the War in Afghanistan and in Operation Freedom’s Sentinel.  As of 2017, the 1st Cavalry Division is subordinate to III Corps and is commanded by Major General John C. Thomson III.

Noble Patron of Armor Award: The Noble Patron of Armor award is the top award given to supporters of the Army's mounted force by the United States Armor Association of the United States Army.

Carmen Helena Téllez: Carmen Helena Téllez (b. Caracas, Venezuela, 25 September 1955) is a Venezuelan-American music conductor.  Reviewed as" "a quiet force behind contemporary music in the United States today” "(www.Sequenza21.com), she has concentrated her career on the exploration of the relationship of music with other arts through her performances of contemporary works for chorus, orchestra and new opera.  She has conducted in the United States, Europe, Israel and Latin America.  After her tenure as Music Director of the National Chorus of Spain, she joined the music faculty at Indiana University in 1992, as Director of the Latin American Music Center and the Contemporary Vocal Ensemble.  For these organizations, she has commissioned and recorded several new works, and has founded the Inter-American Composition Workshops.  During the 2001-2002 period, she was the Resident Conductor of the pioneering Contemporary Chamber Players of Chicago and became the Music Director of the Pocket Opera Players in New York City.

Russian language in the United States: The Russian language is among the top fifteen most spoken languages in the United States.  Since the dissolution of the Soviet Union, many Russians have migrated to the United States and brought the language with them.  Most Russian speakers in the United States today are Russian Jews.  According to the 2010 United States Census the number of Russian speakers was 854,955, which made Russian the 12th most spoken language in the country.

Saint George Award: The Order of Saint George Medallion is the top award given to members of the Army's mounted force by the United States Armor Association of the United States Army.  The award is issued (in increasing levels of prestige) as a black, bronze, silver, or gold medallion, depending on the recipient's eligibility.  s of 2017 , a total of 76 Gold OSGs and 4 Gold NPAs had been awarded, and a total of just over 10,000 medallions of all types.

United States Pacific Command: United States Pacific Command (USPACOM) is a unified combatant command of the United States Armed Forces responsible for the Indo-Asia-Pacific region.  It is the oldest and largest of the unified combatant commands.  Its commander, the senior U.S. military officer in the Pacific, is responsible for military operations in an area which encompasses more than 100 e6sqmi , or roughly 52 percent of the Earth’s surface, stretching from the waters off the west coast of the United States to the west coast of India, and from the Arctic to the Antarctic.  The Commander reports to the President of the United States through the Secretary of Defense and is supported by Service component and subordinate unified commands, including U.S. Army Pacific, U.S. Pacific Fleet, U.S. Pacific Air Forces, U.S. Marine Forces Pacific, U.S. Forces Japan, U.S. Forces Korea, Special Operations Command Korea, and Special Operations Command Pacific.  USPACOM also has three direct reporting units (DRUs), including Daniel K. Inouye Asia-Pacific Center for Security Studies, U.S. Pacific Command Joint Intelligence Operations Center, Center for Excellence in Disaster Management and Humanitarian Assistance; and a Standing Joint Task Force, Joint Interagency Task Force West.  The USPACOM headquarters building, the Nimitz-MacArthur Pacific Command Center, is located on Camp H.M. Smith, Hawaii.

United States Cavalry: The United States Cavalry, or U.S. Cavalry, was the designation of the mounted force of the United States Army from the late 18th to the early 20th century.  The Cavalry branch became the Armor branch with tanks in 1950, but the term "Cavalry" such as "armored cavalry" remains in use in the U.S. Army for mounted (ground and aviation) reconnaissance, surveillance, and target acquisition (RSTA) units based on their parent Combat Arms Regimental System (CARS) regiment.  "Cavalry" is also used in the name of the 1st Cavalry Division for heraldic/lineage/historical purposes.  Some combined arms battalions (i.e., consisting of a combination of tank and mechanized infantry companies) are designated as "armor" formations, while others are designated as "infantry" organizations.  These "branch" designations are again, heraldic/lineage/historical titles derived from the CARS regiments to which the battalions are assigned.

Supporting paragraphs: United States Cavalry 1st Cavalry Division (United States)
Answer: Major General John C. Thomson III