Melvin A. Casberg was born in India

India

India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...

 and grew up in St. Louis, Missouri

St. Louis, Missouri

St. Louis is an independent city on the eastern border of Missouri, United States. With a population of 319,294, it was the 58th-largest U.S. city at the 2010 U.S. Census. The Greater St...

. He was a Major

Major

Major is a rank of commissioned officer, with corresponding ranks existing in almost every military in the world.When used unhyphenated, in conjunction with no other indicator of rank, the term refers to the rank just senior to that of an Army captain and just below the rank of lieutenant colonel. ...

 in the United States Army

United States Army

The United States Army is the main branch of the United States Armed Forces responsible for land-based military operations. It is the largest and oldest established branch of the U.S. military, and is one of seven U.S. uniformed services...

 and the chief medical officer for the United States Army Observation Group

Dixie Mission

The United States Army Observation Group, commonly known as the Dixie Mission, was the first U.S. effort to establish official relations with the Communist Party of China and the People's Liberation Army, then headquartered in the mountainous city of Yan'an...

 to Yenan. More commonly known as the Dixie Mission

Dixie Mission

The United States Army Observation Group, commonly known as the Dixie Mission, was the first U.S. effort to establish official relations with the Communist Party of China and the People's Liberation Army, then headquartered in the mountainous city of Yan'an...

, Casberg was personally selected for the mission by Colonel

Colonel

Colonel , abbreviated Col or COL, is a military rank of a senior commissioned officer. It or a corresponding rank exists in most armies and in many air forces; the naval equivalent rank is generally "Captain". It is also used in some police forces and other paramilitary rank structures...

 David D. Barrett

David D. Barrett

David Dean Barrett was an American soldier, diplomat, and an old Army China hand. Barrett served more than 35 years in the U.S. Army, almost entirely in China...

. During the mission, Casberg undertook many trips into Communist territory to investigate the state of Communist medical practices. Occasionally, he was assisted in this by George Hatem, known in China as Ma Haide.