Robert Callen MacKenzie (November 30, 1948–February 24, 1995) was an American

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 professional soldier

Mercenary

A mercenary, is a person who takes part in an armed conflict based on the promise of material compensation rather than having a direct interest in, or a legal obligation to, the conflict itself. A non-conscript professional member of a regular army is not considered to be a mercenary although he...

 whose career included service as an infantryman 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...

 during the Vietnam War

Vietnam War

The Vietnam War was a Cold War-era military conflict that occurred in Vietnam, Laos, and Cambodia from 1 November 1955 to the fall of Saigon on 30 April 1975. This war followed the First Indochina War and was fought between North Vietnam, supported by its communist allies, and the government of...

, the C Squadron 22 (Rhodesian) SAS

C Squadron 22 (Rhodesian) SAS

The Rhodesian Special Air Service or Rhodesian SAS refers to:*C Squadron, Special Air Service Regiment *"C" Squadron Special Air Service *1 Special Air Service Regiment...

, the South African Defence Force

South African Defence Force

The South African Defence Force was the South African armed forces from 1957 until 1994. The former Union Defence Force was renamed to the South African Defence Force in the Defence Act of 1957...

, and the Transkei

Transkei

The Transkei , officially the Republic of Transkei , was a Bantustan—an area set aside for members of a specific ethnicity—and nominal parliamentary democracy in the southeastern region of South Africa...

 Defence Force.

As a contributing editor for unconventional operations for Soldier of Fortune

Soldier of Fortune (magazine)

Soldier of Fortune , The Journal of Professional Adventurers, is a periodical monthly magazine devoted to world-wide reporting of wars, including conventional warfare, low-intensity warfare, counter insurgency, and counter-terrorism...

 magazine, he was sent to cover conflicts in different hot-spots around the globe, including Mozambique

Mozambique

Mozambique, officially the Republic of Mozambique , is a country in southeastern Africa bordered by the Indian Ocean to the east, Tanzania to the north, Malawi and Zambia to the northwest, Zimbabwe to the west and Swaziland and South Africa to the southwest...

, Central America

Central America

Central America is the central geographic region of the Americas. It is the southernmost, isthmian portion of the North American continent, which connects with South America on the southeast. When considered part of the unified continental model, it is considered a subcontinent...

, Croatia

Croatia

Croatia , officially the Republic of Croatia , is a unitary democratic parliamentary republic in Europe at the crossroads of the Mitteleuropa, the Balkans, and the Mediterranean. Its capital and largest city is Zagreb. The country is divided into 20 counties and the city of Zagreb. Croatia covers ...

, Bosnia

Bosnia and Herzegovina

Bosnia and Herzegovina , sometimes called Bosnia-Herzegovina or simply Bosnia, is a country in Southern Europe, on the Balkan Peninsula. Bordered by Croatia to the north, west and south, Serbia to the east, and Montenegro to the southeast, Bosnia and Herzegovina is almost landlocked, except for the...

, Russia

Russia

Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...

, Thailand

Thailand

Thailand , officially the Kingdom of Thailand , formerly known as Siam , is a country located at the centre of the Indochina peninsula and Southeast Asia. It is bordered to the north by Burma and Laos, to the east by Laos and Cambodia, to the south by the Gulf of Thailand and Malaysia, and to the...

, Suriname

Suriname

Suriname , officially the Republic of Suriname , is a country in northern South America. It borders French Guiana to the east, Guyana to the west, Brazil to the south, and on the north by the Atlantic Ocean. Suriname was a former colony of the British and of the Dutch, and was previously known as...

, Taiwan

Taiwan

Taiwan , also known, especially in the past, as Formosa , is the largest island of the same-named island group of East Asia in the western Pacific Ocean and located off the southeastern coast of mainland China. The island forms over 99% of the current territory of the Republic of China following...

 and Cambodia

Cambodia

Cambodia , officially known as the Kingdom of Cambodia, is a country located in the southern portion of the Indochina Peninsula in Southeast Asia...

.