Franklin J. Camper (born 1946) is a former American soldier and known mercenary.
 He has written both non-fiction and fiction books about his service in Vietnam with the 4th Infantry Division's Long Range Reconnaissance Patrol (LRRP), and also books related to military tactics and how to survive as a mercenary.
 Prior to becoming an author, Frank Camper spent almost 2 decades as a mercenary.
 Several newspapers and radio stations reported that he was involved in the Air India bombings in the 1980s, noting that he trained one of the Sikh bombers at his mercenary school headquartered in Dolomite,AKA "The Bunker".
 The actual "mercenary school" was located about 20 miles west of Dolomite, Alabama.
 Alabama Camper stated that he was unaware of the Sikh's plans.
Albrecht Wenzel Eusebius von Wallenstein ( ; Czech: "Albrecht Václav Eusebius z Valdštejna" ; 24 September 158325 February 1634), also von Waldstein, was a Bohemian military leader and Holy Roman Empire Count palatine, who offered his services, an army of 30,000 to 100,000 men, during the Thirty Years' War (1618–48), to emperor Ferdinand II.
 He became the supreme commander of the armies of the Habsburg Monarchy and was a major figure of the Thirty Years' War.
Titus Lucretius Tricipitinus was a politician and military leader in the early days of the Roman Republic.
 Twice, in the years 508 and 504 BC, he was elected Roman Consul, alongside Publius Valerius Poplicola.
 Also a military leader, he was victorious against Lars Porsenna during his first consulate.
 According to Livy, he led the Roman army together with Valerius against the Sabines in 504 BC and both consuls were awarded the honour of a triumph, however the Fasti Triumphales only mention the triumph of Valerius, in May 504 BC.
Rodrigo de Villandrando (died c. 1457) was a Spanish routier from Castile and mercenary military leader in Gascony during the final phase of the Hundred Years' War.
 He was famous for his pillaging and was consequently known as the Emperor of Pillagers ("empereur des brigands") or L'Écorcheur (the slaughterer).
Condottieri (] ; singular condottiero and condottiere) were the leaders of the professional military free companies (or mercenaries) contracted by the Italian city-states and the Papacy from the late Middle Ages and throughout the Renaissance.
 In Renaissance Italian, "condottiero" meant "contractor".
 In contemporary Italian, "condottiero" acquired the broader meaning of "military leader", not restricted to mercenaries.
 In Italian historiography, Renaissance mercenary captains are usually called capitani di ventura (literally "venture captains").
 The word "Condottiere" in the English language has come to denote, in the modern sense, any hired soldier.
Li Shixian () (b. 1834 - d. 23 August 1865) was a pre-eminent military leader of the late Taiping Rebellion.
 He was the cousin of military leader Li Xiucheng and was known for being very tall for a native of Guangxi province, standing at 2 m tall.
 During his military tenure, he was given the title of King of Shi (侍王) (meaning "Servant Prince").
 In the latter part of the Taiping rebellion, he led Taiping forces to many military victories.
 Later in his life, he invited an aging Wei Yuan to live in his home and was known to hold counsel with the famous scholar.
 He was eventually assassinated by a traitor in Guangdong.
Heinrich Holk (also Holke or Henrik Holck) (April 18, 1599 in Kronborg castle, Denmark – September 9, 1633 in Troschenreuth, Vogtland) was a Danish-German mercenary in both Christian IV of Denmark's and Albrecht von Wallenstein's service during the Thirty Years' War.
Marcus Claudius Marcellus ( ; c. 268 – 208 BC), five times elected as consul of the Roman Republic, was an important Roman military leader during the Gallic War of 225 BC and the Second Punic War.
 Marcellus gained the most prestigious award a Roman general could earn, the spolia opima, for killing the Gallic military leader and king Viridomarus in hand-to-hand combat in 222 BC at the battle of Clastidium.
 Furthermore, he is noted for having conquered the fortified city of Syracuse in a protracted siege during which Archimedes, the famous inventor, was killed.
 Marcus Claudius Marcellus died in battle in 208 BC, leaving behind a legacy of military conquests and a reinvigorated Roman legend of the "spolia opima".
Count Jindřich Matyáš Thurn-Valsassina (German: "Heinrich Matthias Graf von Thurn und Valsassina"; Italian: "Enrico Matteo Conte della Torre di Valsassina") (24 February 1567 – 26 January 1640), was a Bohemian nobleman, one of leaders of Protestant Bohemian Revolt against Emperor Ferdinand II and in events that led to the Thirty Years War, and in the end a military leader and diplomat in Swedish service, who eventually resided in Swedish Estonia.
General Juan Antonio Sotillo (1790 - 1878) was a nineteenth-century military leader from Venezuela.
 During his long life, uncommon for a military leader at the time, he served under the army of Venezuelan general Simón Bolívar, as well as in most of Venezuela's 19th century civil wars and military revolts.

Question: Heinrich Holk was a mercenary in the service of the military leader of what heritage?
Answer: Bohemian