Question: What service medal that is now only awarded to members of the United States Army did Casey Loomis earn during World War 1?

Context articles: Casey Loomis
Lloyd Austin
Jaimie Leonard
Defense Meritorious Service Medal
Otto Abernetty
Texas Cavalry Service Medal
Army of Occupation Medal
Texas Cavalry Medal
Yangtze Service Medal
Distinguished Service Cross (United States)

Casey Loomis served in the United States Marine Corps during World War I.
 He would be awarded the Navy Cross, the Distinguished Service Cross, and the Silver Star.
Lloyd James Austin III (born August 8, 1953) is a retired United States Army general.
 He was the 12th commander of United States Central Command (CENTCOM).
 Austin was the first African American to head the organization.
 Prior to his assignment in CENTCOM, Austin served as the 33rd Vice Chief of Staff of the United States Army from January 31, 2012, to March 8, 2013.
 His assignments prior to CENTCOM were as the last Commanding General of United States Forces - Iraq, Operation New Dawn, which ended on December 18, 2011, and then Vice Chief of Staff of the United States Army.
 On December 6, 2012, the Pentagon announced that President Barack Obama had nominated Austin to lead the U.S. Central Command.
 Austin was confirmed by the U.S. Senate on March 5, 2013, and assumed command on March 22, 2013.
 On April 5, 2016, Austin's retirement ceremony took place at Joint Base Myer–Henderson Hall.
 He received the Defense Distinguished Service Medal, the Army Distinguished Service Medal, the Defense Superior Service Medal, the Legion of Merit, and others.
Jaimie E Leonard (died 8 June 2013) was a lieutenant colonel in the United States Army and a part of the Headquarters and Headquarters Company, 2nd Brigade Combat Team, 10th Mountain Division, Fort Drum, New York.
 She was 39 years old when she died in Sharana, Afghanistan, as a result of a small arms-related injury.
 Previously deployed in Bosnia (1999) and Iraq (2005), she was deployed in Afghanistan in 2011, where she acquired fatal injuries in the process of training Afghan soldiers in Paktika province.
 In her career as a military intelligence officer, Leonard was honored with two Bronze Stars, two Meritorious Service Medals, the Joint Commendation Medal, three Army Commendation Medals, the Valorous Unit Award, the Meritorious Unit Commendation, the National Defense Service Medal, Armed Forces Expeditionary Medal, Afghanistan Campaign Medals, Iraq Campaign Medal, the Global War on Terrorism Expeditionary Medal, the Global War on Terrorism Service Medal, the Korean Defense Service Medal, the Army Service Ribbon, five Overseas Service Ribbons, the NATO Badge, Parachutist Badge, and the Army Staff Identification Badge.
The Defense Meritorious Service Medal (DMSM) is an award bestowed upon members of the United States military by the United States Department of Defense.
 In the order of precedence of the United States Armed Forces, it is worn between the Purple Heart and the Meritorious Service Medal.
 The medal is awarded in the name of the Secretary of Defense to members of the Armed Forces who, while serving in a joint activity, distinguish themselves by non-combat outstanding achievement or meritorious service, but not of a degree to warrant award of the Defense Superior Service Medal.
Otto Abernetty (* March 8, 1893 in Steinbeck-Ancker - † July 2, 1940 in Chateaudun) was a Generalmajor der Flieger in the Wehrmacht during World War II.
 During his career, he was awarded the Cross of Honor for Combatants, 1914-1918, a Long Service Medal 4th Class, 4 Years, a Long Service Medal 3rd Class, 12 Years, a Long Service Medal 2nd Class, 18 Years, a Long Service Medal 1st Class, 25 Years, and an Observer Badge.
 He also was awarded the Wound Badge.
 He was killed in a plane crash over France in and is buried at "Cimetière militaire allemand de Champigny-St.
 André".
The Texas Cavalry Service Medal is a service medal of the Texas National Guard which was created by the Texas Legislature under Senate Bill 955 and signed into law by Governor Rick Perry June 17, 2005.
 Senate Bill 955, an amendment to Texas Government Code § 431.134, became effective on September 1, 2005.
 The Texas Cavalry Medal is awarded to personnel who served on or after September 11, 2001, in the 124th Cavalry, Texas Army National Guard and who served in a hostile fire zone as designated by the United States Secretary of Defense.
 This medal is a one time award and there is no provision for subsequent awards.
 The first 182 cavalry troopers eligible for the award completed their tour of duty in Iraq on February 11, 2005.
 Carrying the same unit heraldry as the 1st Squadron, 124th Cavalry Regiment, members of the Texas National Guard's Brigade Reconnaissance Troops mobilized for Operation Iraqi Freedom III were also eligible for this award.
 The order of precedence for this new award has it falling between the Texas Combat Service Ribbon and the Texas Faithful Service Medal.
 The Texas Cavalry Service Medal is no longer awarded.
The Army of Occupation Medal is a military award of the United States military which was established by the United States War Department on 5 April 1946.
 The medal was created in the aftermath of the Second World War to recognize those who had performed occupation service in either Germany, Italy, Austria, or Japan.
 The original Army of Occupation Medal was intended only for members of the United States Army, but was expanded in 1948 to encompass the United States Air Force shortly after that service's creation.
 The Navy and Marine equivalent of the Army of Occupation Medal is the Navy Occupation Service Medal.
The Texas Cavalry Medal was a federal service medal, approved by the United States Congress and awarded to the members of the cavalry brigades raised by the State of Texas who were not called into federal for service in 1917 and 1918, rendering the men of those two units ineligible for the World War I Victory Medal.
 Qualifying dates of the Texas Cavalry Service Medal were from December 8, 1917 to November 11, 1918.
 Only 840 medals were awarded for this time period.
The Yangtze Service Medal is a decoration of the United States military which was created in 1930 for presentation to members of the United States Navy and United States Marine Corps (and to a lesser extent, members of the United States Army).
 The Yangtze Service Medal is awarded for service in the Yangtze River Valley between the dates of September 3, 1926 and December 31, 1932, a period of significant unrest in the region.
The Distinguished Service Cross is the second highest military award that can be given to a member of the United States Army (and previously, the United States Army Air Forces and the United States Air Force), for extreme gallantry and risk of life in actual combat with an armed enemy force.
 Actions that merit the Distinguished Service Cross must be of such a high degree that they are above those required for all other U.S. combat decorations but do not meet the criteria for the Medal of Honor.
 The Distinguished Service Cross is equivalent to the Navy Cross (Navy and Marine Corps), the Air Force Cross (Air Force), and the Coast Guard Cross (Coast Guard).