Question: Jack Belden, was an American war correspondent who covered which military conflict fought primarily between the Republic of China and the Empire of Japan from July 7, 1937 to September 9, 1945?

Context paragraphs:
Second Sino-Japanese War: The Second Sino-Japanese War was a military conflict fought primarily between the Republic of China and the Empire of Japan from July 7, 1937 to September 9, 1945.  It began with the Marco Polo Bridge Incident in 1937 in which a dispute between Japanese and Chinese troops escalated into a battle.  The conflict then escalated further into a full-scale war.  It ended with the unconditional surrender of Japan on September 2, 1945 to the Allies of World War II.

Bellum Batonianum: The Bellum Batonianum (Latin for "war of the Batos") was a military conflict fought in the Roman province of Illyricum in which an alliance of the native peoples of Illyricum rebelled against the Romans.  The name Batonianum holds some similarity to early Bosnian name Bestonensis and Illyrian state Bossona.  There were two regions in this Roman province: Dalmatia and Pannonia.  The rebellion began among native peoples who were recruited as auxiliary troops for the Romans.  They were led by Bato the Daesitiate (the Deasitiae were a tribe which lived in Dalmatia).  They were joined by the Breuci (a tribe in Pannonia) led by Bato the Breucan.  Many other tribes in Illyria also joined the revolt.  The Roman called this conflict bellum batonianum (Batonian war) after these two leaders who had the same name.  Velleius Paterculus called it the Pannonian and Dalmatian war because it involved both regions of Illyricum.  In English it has been called the "Great Illyrian revolt", "Pannonian-Dalmatian uprising" and "Bato uprising."  This four-year war, which lasted from 6 AD to 9 AD, saw a large deployment of Roman forces in the province, with whole armies operating across the western Balkans and fighting on more than one front.  In 8 AD the Breuci of the Sava valley surrendered, but it took another winter blockade and a season of fighting before the surrender in Dalmatia came in 9 AD .  The Roman historian Suetonius described this war as the most difficult conflict faced by Rome since the Punic Wars two centuries earlier.

Second Anglo-Afghan War: The Second Anglo–Afghan War (Pashto: د افغان-انګرېز دويمه جګړه) was a military conflict fought between the British Raj and the Emirate of Afghanistan from 1878 to 1880, when the latter was ruled by Sher Ali Khan of the Barakzai dynasty, the son of former Emir Dost Mohammad Khan.  This was the second time British India invaded Afghanistan.  The war ended after the British emerged victorious against the Afghan rebels and the Afghans agreed to let the British attain all of their geopolitical objectives from the Treaty of Gandamak.  Most of the British and Indian soldiers withdrew from Afghanistan.  The Afghan tribes were permitted to maintain internal rule and local customs but they had to cede control of the area's foreign relations to the British, who, in turn, guaranteed the area's freedom from foreign military domination as a buffer between the British Raj and the Russian Empire.

Undeclared war: An undeclared war is a military conflict between two or more nations without either side issuing a formal declaration of war.  The term is sometimes used to include any disagreement or conflict fought about without an official declaration.  Since the United Nations "police action" in Korea followed the example set by the United Kingdom during the so-called Malaysian Emergency, a number of democratic governments have pursued disciplinary actions and limited warfare by characterizing them as something else, such as a "military action" or "armed response".  The United States has not formally declared war since World War II.  Most notably, the United States never officially declared war during its more than decade-long involvement in Vietnam; the Gulf of Tonkin Resolution authorized the escalation of the Vietnam War without a declaration of war.  Nations such as France, which had extensive colonies in which its military provided order, continued to intervene in their former colonies' affairs as police actions.

Crimean War: The Crimean War (French: "Guerre de Crimée" ; Russian: Кры́мская война́ "Krymskaya voina" or Russian: Восто́чная война́ "Vostochnaya voina" ("Eastern War"); Turkish: "Kırım Savaşı" ) was a military conflict fought from October 1853 to February 1856 in which the Russian Empire lost to an alliance of the Ottoman Empire, France, Britain and Sardinia.  The immediate cause involved the rights of Christian minorities in the Holy Land, which was a part of the Ottoman Empire.  The French promoted the rights of Roman Catholics, while Russia promoted those of the Eastern Orthodox Church.  The longer-term causes involved the decline of the Ottoman Empire and the unwillingness of Britain and France to allow Russia to gain territory and power at Ottoman expense.  It has widely been noted that the causes, in one case involving an argument over a key, have never revealed a "greater confusion of purpose", yet led to a war noted for its "notoriously incompetent international butchery".

Byzantine civil war of 1373–1379: The Byzantine civil war of 1373–1379 was a military conflict fought in the Byzantine Empire between Byzantine Emperor John V Palaiologos and his son, Andronikos IV Palaiologos, also growing into an Ottoman civil war as well, when Savcı Bey, the son of Ottoman Emperor Murad I joined Andronikos in a joint rebellion against their fathers.  It began when Andronikos sought to overthrow his father in 1373.  Although he failed, with Genoese aid, Andronikos was eventually able to overthrow and imprison John V in 1376.  In 1379 however, John V escaped, and with Ottoman help, regained his throne.  The civil war further weakened the declining Byzantine Empire, which had already suffered several devastating civil wars earlier in the century.  The major beneficiary of the war were the Ottomans, whose vassals the Byzantines had effectively become.

Jack Belden: Jack Belden (February 3, 1910 in Brooklyn, New York – June 3, 1989 in Paris) was an American war correspondent who covered the Japanese invasion of China, the Second World War and the Chinese Revolution.

Forty Years' War: The Forty Years' War (Burmese: အနှစ်လေးဆယ်စစ် ; 1385 – 1424; also Ava-Pegu War or the Mon-Burmese War) was a military conflict fought between the Burmese-speaking Kingdom of Ava and the Mon-speaking Kingdom of Hanthawaddy Pegu.  The war was fought during two separate periods: 1385 to 1391, and 1401 to 1424, interrupted by two truces of 1391–1401 and 1403–1408.  It was fought primarily in today's Lower Burma and also in Upper Burma, Shan State and Rakhine State.  It ended in a stalemate, preserving the independence of Hanthawaddy, and effectively ending Ava's efforts to rebuild the erstwhile Pagan Empire.

Chaco War: The Chaco War (1932–1935; Spanish: "Guerra del Chaco" , Guarani: "Cháko Ñorairõ" ) was fought between Bolivia and Paraguay over control of the northern part of the Gran Chaco region (known in Spanish as "Chaco Boreal") of South America, which was thought to be rich in oil.  It is also referred to as "La Guerra de la Sed" (Spanish for "The War of Thirst") in literary circles, for being fought in the semi-arid Chaco.  It was the bloodiest military conflict fought in South America during the 20th century, between two of its poorest countries, both having previously lost territory to neighbors in 19th-century wars.

Thomas Franklin Fairfax Millard: Thomas Franklin Fairfax Millard (born July 8, 1868 in Missouri; died September 7, 1942 in Seattle, Washington) was an American journalist, newspaper editor, founder of the "China Weekly Review", author of seven influential books on the Far East and first American political adviser to the Chinese Republic, serving for over fifteen years.  Millard was "the founding father of American journalism in China", and "the dean of American newspapermen in the Orient," who "probably has had a greater influence on contemporary newspaper journalism than any other American journalist in China.”  Millard was a war correspondent for the "New York Herald" during the Spanish–American War, the Boer War, the Boxer Uprising, the Russo-Japanese War and the Second Sino-Japanese War; he also had articles appear in such publications as "The New York Times", "New York World", "New York Herald", "New York Herald Tribune", "Scribner's Magazine", "The Nation "and "The Cosmopolitan", as well as in Britain's "Daily Mail" and the English-language "Kobe Weekly Chronicle" of Japan.  Millard was the Shanghai correspondent for "The New York Times" from 1925.  Millard was involved in the Twain-Ament Indemnities Controversy, supporting the attacks of Mark Twain on American missionary William Scott Ament.

Supporting paragraphs: Jack Belden Second Sino-Japanese War
Answer: Second Sino-Japanese War