Question: Which man, Joe Manganiello or Richard G. Hovannisian,  is known mainly for his four-volume history of the First Republic of Armenia?

Context paragraphs:
Treaty of Batum: The Treaty of Batum was signed in Batum on June 4, 1918, between the Ottoman Empire and the three Transcaucasian states: the First Republic of Armenia, the Azerbaijan Democratic Republic and the Democratic Republic of Georgia.  It was the first treaty of the First Republic of Armenia and the Azerbaijan Democratic Republic and had 14 articles.

Joe Manganiello: Joseph Michael Manganiello ( ; ] ; born December 28, 1976) is an American actor.  He played Flash Thompson in Sam Raimi's "Spider-Man" trilogy and had various recurring roles in television on "ER", "How I Met Your Mother", and "One Tree Hill", before landing his breakout role as werewolf Alcide Herveaux on the HBO television series "True Blood".  In 2011, he was voted "Favorite Pop-Culture Werewolf of All Time" by the readers of "Entertainment Weekly", and one of "Men's Health"'s "100 Fittest Men of All Time".

Armenian Soviet Socialist Republic: Armenia ( , ; Armenian: Հայաստան , tr.  "Hayastan", ] ; Russian: Армения ; "Armeniya"), officially the Armenian Soviet Socialist Republic; (Armenian SSR; Armenian: Հայկական Սովետական Սոցիալիստական Հանրապետություն "Haykakan Sovetakan Soc'ialistakan Hanrapetut'yun" ; Russian: Армя́нская Сове́тская Социалисти́ческая Респу́блика "Armyanskaya Sovetskaya Sotsialističeskaya Respublika"), also commonly referred to as Soviet Armenia was one of the constituent republics of the Soviet Union in December 1922 located in the South Caucasus region of Eurasia.  It was established in December 1920, when the Soviets took over control of the short-lived First Republic of Armenia and lasted until 1991.  It is sometimes called the Second Republic of Armenia, following the First Republic of Armenia's demise.

Armenia–Azerbaijan relations: Armenia–Azerbaijan relations refers to the bilateral relationship of Armenia and Azerbaijan, as well as relations between the Armenian and the Azerbaijani societies.  The neighboring nations had formal governmental relations between 1918 and 1921, during their brief independence from the collapsed Russian Empire, as the First Republic of Armenia and the Democratic Republic of Azerbaijan; these relations existed from the period after the Russian Revolution until they were occupied and annexed again by the successor state, the Soviet Union.  Due to the two wars between the countries in the past century – one from 1918 to 1921 and another from 1988 to 1994 – their relations, or the lack thereof, have been shaped due to the conflict over the Nagorno-Karabakh region.  There are no diplomatic relations between the two countries and they are still at war because of the ongoing Nagorno-Karabakh conflict and dispute.

Yektan Turkyilmaz: Yektan Türkyilmaz is a Turkish scholar of Kurdish origin associated with Duke University.  Türkyilmaz, then 33, is most often cited for his June, 2005, arrest and imprisonment upon his intended departure from a research trip to Armenia.  The first individual of Turkish nationality who had been granted access to the National Archives of Armenia, Türkyilmaz was also one of the small number of intellectuals of Turkish origin who had argued that Armenians as a group had been targeted for atrocities by the then Turkish government during and following 1915.  His arrest, initially without charges, generated surprise and protests from circles in Turkey and also the United States, including from Richard Hovannisian of the University of California at Los Angeles, and former US Senator Bob Dole.  Türkyilmaz later said that security officials who had arrested him appeared to have thought him involved in espionage, but eventually he was charged with illegally removing books and other materials, more than fifty years old, that he had openly and legally purchased in Armenia, or which had been presented to him as gifts during his research.  In August, 2005, Türkyilmaz was set free with a suspended sentence.

Alexander Khatisian: Alexander Khatisian (Armenian: Ալեքսանդր Խատիսեան ) (February 17, 1874 in Tiflis – March 10, 1945 in Paris) was an Armenian politician and a journalist.  Khatisian was born in Tiflis, Tiflis Governorate, Russian Empire (now Tbilisi), Georgia).  He served as the mayor of Tiflis (Tbilisi) from 1910 to 1917.  During this period Count Illarion Ivanovich Vorontsov-Dashkov consulted with him, the primate of Tbilisi, Bishop Mesrop Der-Movsesian, and the prominent civic leader Dr. Hakob Zavriev about the creation of Armenian volunteer detachments in the summer of 1914.  During the establishment of First Republic of Armenia, he served as a member from the Armenian National Council of Tiflis to the Armenian National Council and later to the permanent executive committee selected by Armenian Congress of Eastern Armenians.  After declaration of the First Republic of Armenia, he served as Foreign Minister and signed the Treaty of Batum with the Ottoman Empire.  He was elected as the prime minister from 1919 to 1920.  Khatisian died in exile in Paris, France on 10 March 1945.

Christophor Vermishyan: Christophor Avvakumyan Vermishyan(ts) (Armenian: Քրիստոփոր Վերմիշև January 1863 in Baku – 1932) was an Armenian politician who served as Minister of Social Protection of the First Republic of Armenia from 1918 to 1919 and as Minister of Provisions of the First Republic of Armenia in 1919

USNS Richard G. Matthiesen (T-AOT-1124): USNS "Richard G. Matthiesen" (T-AOT-1124) was one of four tankers, known as T5s, with double hulls ice-strengthened for protection against damage during missions in extreme climates.  She was part of Military Sealift Command's Sealift Program, transporting fuel for the Department of Defense.  "Richard G. Matthiesen" had missions including refueling the National Science Foundation in Antarctica and Thule Air Base in Greenland.  She was named after Richard G Matthiesen, a Merchant Marine Distinguished Service Medal recipient.

Richard G. Hovannisian: Richard Gable Hovannisian (Armenian: Ռիչարդ Հովհաննիսյան , born November 9, 1932) is an Armenian American historian and professor emeritus at the University of California, Los Angeles.  He is known mainly for his four-volume history of the First Republic of Armenia.

Red Army invasion of Armenia: The Red Army invasion of Armenia, also known as the Russian-Armenian war or Sovietization or Soviet invasion of Armenia, was a military campaign carried out by the 11th Army of Soviet Russia from September to 29 Noyember 1920 to install a new Soviet government in the First Republic of Armenia, a former territory of the Russian and Ottoman Empires.  The invasion coincided with the anti-government insurrection staged by the local Armenian Bolsheviks in the capital, Yerevan, and other cities and populated place over the country.  The invasion led to the dissolution of the First Republic of Armenia and the establishment of the Armenian Soviet Socialist Republic.

Supporting paragraphs: Joe Manganiello Richard G. Hovannisian
Answer: Richard Gable Hovannisian