OCR A-Level History A H505
Y101: Alfred and the Making of England 871–1016Unit group 1
Y102: Anglo-Saxon England and the Norman Conquest 1035–1107Unit group 1
Y103: England 1199–1272Unit group 1
Y104: England 1377–1455Unit group 1
Y105: England 1445–1509: Lancastrians, Yorkists and Henry VIIUnit group 1
Y106: England 1485–1558: The Early TudorsUnit group 1
Y107: England 1547–1603: The Later TudorsUnit group 1
Y108: The Early Stuarts and the Origins of the Civil War 1603–1660Unit group 1
Y109: The Making of Georgian Britain 1678–c.1760Unit group 1
Y110: From Pitt to Peel 1783–1853Unit group 1
Y111: Liberals, Conservatives and the Rise of Labour 1846–1918Unit group 1
Y112: Britain 1900–1951Unit group 1
Y113: Britain 1930–1997Unit group 1
Y201: The Rise of Islam c.550–750Unit group 2
Y202: Charlemagne 768–814Unit group 2
Y203: The Crusades and the Crusader States 1095–1192Unit group 2
Y204: Genghis Khan and the Explosion From the Steppes c.1167–1405Unit group 2
Y205: Exploration, Encounters and Empire 1445–1570Unit group 2
Y206: Spain 1469–1556Unit group 2
Y207: The German Reformation and the Rule of Charles v 1500–1559Unit group 2
Y208: Philip II 1556–1598Unit group 2
Y209: African Kingdoms c.1400–c.1800: Four Case StudiesUnit group 2
Y210: Russia 1645–1741Unit group 2
Y211: The Rise and Decline of the Mughal Empire in India 1526–1739Unit group 2
Y212: The American Revolution 1740–1796Unit group 2
Y213: The French Revolution and the Rule of Napoleon 1774–1815Unit group 2
Y214: France 1814–1870Unit group 2
Y215: Italy and Unification 1789–1896Unit group 2
Y216: The USA in the 19th Century: Westward Expansion and Civil War 1803–c.1890Unit group 2
Y217: Japan 1853–1937Unit group 2
Y218: International Relations 1890–1941Unit group 2
Y219: Russia 1894–1941Unit group 2
Y220: Italy 1896–1943Unit group 2
Y221: Democracy and Dictatorships in Germany 1919–1963Unit group 2
Y222: The Cold War in Asia 1945–1993Unit group 2
Y223: The Cold War in Europe 1941–1995Unit group 2
Y224: Apartheid and Reconciliation: South African Politics 1948–1999Unit group 2
Y301: The Early Anglo-Saxons c.400–800Unit group 3
Y302: The Viking Age c.790–1066Unit group 3
Y303: English Government and the Church 1066–1216Unit group 3
Y304: The Church and Medieval Heresy c.1100–1437Unit group 3
Y305: The Renaissance c.1400–c.1600Unit group 3
Y306: Rebellion and Disorder Under the Tudors 1485–1603Unit group 3
Y307: Tudor Foreign Policy 1485–1603Unit group 3
Y308: The Catholic Reformation 1492–1610Unit group 3
Y309: The Ascendancy of the Ottoman Empire 1453–1606Unit group 3
Y310: The Development of the Nation State: France 1498–1610Unit group 3
Y311: The Origins and Growth of the British Empire 1558–1783Unit group 3
Y312: Popular Culture and the Witchcraze of the 16th and 17th CenturiesUnit group 3
Y313: The Ascendancy of France 1610–1715Unit group 3
Y314: The Challenge of German Nationalism 1789–1919Unit group 3
Y315: The Changing Nature of Warfare 1792–1945Unit group 3
Y316: Britain and Ireland 1791–1921Unit group 3
Y317: China and Its Rulers 1839–1989Unit group 3
Y318: Russia and Its Rulers 1855–1964Unit group 3
Y319: Civil Rights in the USA 1865–1992Unit group 3
Y320: From Colonialism to Independence: The British Empire 1857–1965Unit group 3
Y321: The Middle East 1908–2011: Ottomans to Arab SpringUnit group 3
Y222: The Cold War in Asia 1945–1993
Wars in Vietnam and Cambodia 1968–1993: the fall of Saigon and the Cambodian conflict
- 3 things to know
- Unit group 2
Overview
Recall questions on South Vietnam’s collapse and the American failure, Sihanouk, Cambodia’s civil war and American bombing, the Khmer Rouge and Democratic Kampuchea, the Vietnamese invasion and the settlement of 1991 to 1993.
What you need to know
Answer each one before you reveal it.
Explain why South Vietnam collapsed in 1975.
How did the Khmer Republic fall?
Questions from this subtopic
Each one with the model answer underneath.
- 1
Explain why South Vietnam collapsed in 1975.
Model answer
American air support had gone and Congress had cut aid while Nixon's resignation removed any prospect of re-intervention, so a northern offensive in the spring broke the demoralised southern army and Saigon fell on 30 April.
- 2
Give three reasons why the United States failed to win the war in Vietnam.
Model answer
It fought a limited war for a corrupt and unpopular ally, its firepower-based tactics alienated the peasantry it needed to win over, and the enemy had secure sanctuaries and Soviet and Chinese supplies while American public support drained away.
- 3
How did Sihanouk try to protect Cambodia between 1955 and 1970?
Model answer
He gave up the throne to lead his own political movement and steered a neutral course, taking aid from both blocs, breaking with Washington in the mid-1960s and tolerating North Vietnamese use of Cambodian territory.
- 4
How did Cambodia's civil war begin?
Model answer
Sihanouk was deposed in 1970 by his pro-American prime minister Lon Nol, whose Khmer Republic then faced the Khmer Rouge, now allied with the exiled Sihanouk and supported by North Vietnamese troops already inside the country.
- 5
What effect did American bombing have on Cambodia?
Model answer
The secret and then open bombing of communist sanctuaries killed large numbers of peasants and drove refugees into Phnom Penh, wrecking the rural economy and helping the Khmer Rouge recruit.
- 6
How did the Khmer Republic fall?
Model answer
Corrupt and dependent on American aid, Lon Nol's government lost the countryside and was besieged in the capital, and the Khmer Rouge entered Phnom Penh in April 1975.
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