AQA冷战 雅尔塔 马歇尔计划 古巴导弹危机
冷战不是一场正式宣战的战争，而是 1945 年到 1991 年间以意识形态、军备与代理冲突为主的长期对峙。它从雅尔塔与波茨坦的战时妥协起步，经过柏林封锁、古巴导弹危机与布拉格之春几次临界时刻，最后在戈尔巴乔夫的改革里结束。学这段历史最常见的困难不是记不住年份，而是分不清哪一步是原因、哪一步是结果。下面按十四个具体知识点拆开讲，并把 AQA 与 Edexcel 两个考试局的版面差别写在最后。
The Cold War was a confrontation fought through ideology, armaments and proxy conflicts rather than a declared war. It began with the wartime bargains at Yalta and Potsdam, passed through Berlin, Cuba and Prague, and ended with Gorbachev's reforms. The difficulty in this period is rarely remembering dates; it is separating causes from consequences.
雅尔塔与波茨坦：分区占领与波兰边界
雅尔塔会议在 1945 年 2 月召开，罗斯福、丘吉尔与斯大林在克里米亚谈成了德国分区占领与联合国框架。会议还确认苏联在德国投降后两到三个月内对日作战，代价是收回库页岛南部与千岛群岛。波兰问题上三方只拿到一句模糊承诺，即组建包含各派的临时政府并举行自由选举。很多学生以为雅尔塔已经把欧洲切开，其实真正落地的是占领区与赔偿条款。波茨坦会议在 1945 年 7 月到 8 月举行，这时美方已是杜鲁门，英方中途由艾德礼接替丘吉尔。会上确认了四国分区占领与去纳粹化原则，赔偿按各占领区分别提取。原子弹试验成功的消息在会议期间传来，美方对苏联参战的依赖明显下降。常见的错误是把两次会议写成同一次，导致后面的德国分裂与柏林封锁找不到起点。
The Yalta conference of February 1945 settled the zones of occupation and the shape of the United Nations, while leaving Poland with a promise that neither side could enforce. By the time the same leaders met at Potsdam in the summer, the American delegation had a new president and a tested atomic bomb, which weakened Washington's need to bargain. Answers that treat the two conferences as one event make the division of Germany look inevitable rather than negotiated, and that reading quietly removes Polish and German questions from the story.
长电报与铁幕演说：遏制思路的来源
美国外交官凯南在 1946 年 2 月从莫斯科发回一份长约八千字的电报，主张苏联的行为来自内部安全需要，而不是外部威胁。他的判断是对方会持续扩张但不冒大战风险，所以合适的办法是长期、耐心、坚定的遏制。丘吉尔在 1946 年 3 月于美国富尔顿发表演说，用铁幕形容从波罗的海到亚得里亚海的分界。这篇演说在当时引起争议，因为它把战时盟友直接写成了对手。凯南的电报后来以 X 先生署名发表在《外交事务》上，成为遏制政策最常被引用的文本。很多学生以为杜鲁门主义是凭空出现，实际上是这两份文件先给了思路。阅卷时最容易丢分的地方，是把凯南的主张写成军事进攻而非政治与经济手段。
George Kennan's long telegram of February 1946 argued that Soviet behaviour came from an internal sense of insecurity, and that the answer was patient containment rather than war. Churchill's Fulton speech gave the split a name, describing an iron curtain running from the Baltic to the Adriatic. Candidates lose marks when they describe containment as a military offensive, since its instruments were economic aid, alliances and political pressure.
杜鲁门主义与马歇尔计划：美元与枪炮的两条轨道
英国在 1947 年初无法继续负担希腊与土耳其的军事援助，美国因此在 3 月由杜鲁门向国会提出援助方案，这就是杜鲁门主义。它的表述把世界分成自由制度与集权制度两种生活方式，并把援助希腊与土耳其说成捍卫自由的选择。马歇尔计划在 1947 年 6 月由国务卿提出，邀请欧洲国家共同制定复兴方案，苏联与东欧最初也在被邀之列。捷克与波兰一度有意加入，苏联随后禁止卫星国接受援助。援助总额约一百三十亿美元，附加条件包括受援国之间的经济协调与贸易自由化。常见的错误是把马歇尔计划只写成经济援助，忽略它同时是削弱共产党影响力的政治工具。
When Britain told Washington in early 1947 that it could no longer fund the Greek and Turkish governments, Truman framed the aid as a choice between two ways of life. The Marshall Plan followed in June, offering dollars to any European state willing to coordinate its recovery, a condition Moscow read as an opening into its own sphere. The plan was as much political as economic, since its conditions pulled recipients away from communist parties, and Comecon was founded in 1949 as the Soviet answer to it.
柏林封锁与空运：第一次柏林危机
西方三国在 1948 年推进西占区货币改革，苏联以封锁西柏林对外陆路作为回应。封锁从 1948 年 6 月开始，持续近十一个月，涉及公路、铁路与运河。西方以空运维持城市供应，最紧张时每天起降的运输机超过一千架次。空运总量最终接近两百三十万吨，煤与食品是主要物资。封锁在 1949 年 5 月解除，随后出现了两个德国与两个柏林。很多学生以为空运只是一次人道救援，其实它是一次对封锁能否奏效的公开测试。阅卷时若只写空运成功而不写货币改革这个起因，因果关系会被判为不完整。
The Western powers introduced a new currency in their zones in 1948, and Stalin answered by cutting the land routes into West Berlin. For almost eleven months the city was supplied by air, with coal and food making up most of the cargo. The blockade was lifted in May 1949 and left two German states behind, so an answer that treats the airlift as purely humanitarian misses the political test at stake.
北约与华约：两个军事集团的成形
布鲁塞尔条约在 1948 年先由英法荷比卢五国签订，随后美国与加拿大加入谈判。北大西洋公约在 1949 年 4 月签署，核心条款是第五条，把对一国的攻击视为对全体的攻击。西德在 1955 年加入北约，苏联在同月促成华约成立。两个集团的成员国数量与地理范围，把欧洲的安全问题锁成了两极结构。华约的军队名义上是联合指挥，实际上由苏联主导。常见的错误是把北约写成联合国下属机构，它依自己的条约与理事会运作，与联合国是两套体系。
The Brussels Treaty of 1948 brought five western European states together, and the talks that followed drew in the United States and Canada. When NATO was signed in April 1949, its fifth article turned an attack on one member into an attack on all. West Germany's entry in 1955 produced the Warsaw Pact within days, completing a division of Europe that ran through institutions rather than front lines.
朝鲜战争：冷战从欧洲扩到亚洲
朝鲜半岛在 1945 年按三八线分区受降，南北两侧随后建立起对立政权。1950 年 6 月北方向南推进，安理会通过决议组建以美国为首的联合国军。中国在同年 10 月参战，战线在三十八度线附近反复移动。停战协定在 1953 年 7 月签署，双方至今没有签订和平条约。这场战争把军备竞赛推向全球，美国国防开支在 1950 年后大幅上升。日本在这段时间成为美军后勤与生产基地，经济复苏因此加速。很多学生以为冷战只在欧洲，朝鲜战争正好说明代理冲突可以发生在边缘地带。
Korea was divided at the 38th parallel in 1945, and the advance across that line in June 1950 produced a United Nations force led by Washington. Chinese intervention in October pushed the front back towards the original border, and the armistice of July 1953 left no peace treaty behind. Rearmament after 1950 and Japan's new role as a supply base show how quickly a regional war could reshape the wider confrontation, and the spending plans set out in NSC-68 finally had a justification.
匈牙利1956：势力范围的红线
匈牙利在 1956 年 10 月爆发大规模示威，纳吉出任总理后宣布多党制与退出华约。苏联最初撤出部分部队，随后在 11 月 4 日投入大规模兵力进入布达佩斯。战斗持续数日，纳吉在避难中被带走，后来被处决。约二十万人在这段时间逃往奥地利，成为战后欧洲较大的一次难民潮。西方在苏伊士危机中自顾不暇，没有采取军事行动。卡达尔政权随后重建一党体制，并长期把这次事件称为反革命。常见的错误是把匈牙利写成西方默许的失败，实际上西方连有效的经济与外交手段都没有拿出来。
Demonstrations in Budapest in October 1956 brought Imre Nagy to power, and his announcement of a multi party system and withdrawal from the Warsaw Pact crossed a line Moscow would not accept. Soviet armour entered the city on 4 November, and around two hundred thousand people left for Austria as the fighting ended. Western attention was fixed on Suez that autumn, so the crisis is best read as a limit test on both sides.
柏林墙1961：一夜之间封住的边界
东德人口在 1949 年到 1961 年间持续外流，技术工人与年轻人占了很大比例。1961 年 8 月 13 日凌晨，东德在柏林市内部署铁丝网与岗哨，几天内开始砌墙。柏林墙把城市切成两部分，也把逃亡的主要通道关掉。肯尼迪在 1963 年访问西柏林时发表演说，把墙作为制度对比的象征。墙的存在稳定了东德政权，也让分裂变成日常可见的实物。很多学生以为墙是苏联直接下令修建，实际执行者是东德政府，苏方提供的是政治与军事背书。阅卷时若把修建时间写成 1961 年之前，后面关于逃亡人数的分析会全部失分。
East Germany had been losing skilled workers and young people for more than a decade before barbed wire went up inside Berlin on 13 August 1961. The wall closed the last easy route to the West and stabilised a state that had been draining its own workforce. Kennedy's visit in 1963 turned the barrier into a symbol, though the decision to build it belonged to East Berlin rather than Moscow, and the monthly flow of refugees fell sharply within a few months.
古巴导弹危机：十三天与秘密交易
美国侦察机在 1962 年 10 月 14 日拍到古巴境内的导弹阵地，肯尼迪在 10 月 16 日得到确认。美方在 10 月 22 日宣布海上隔离，用隔离这个词避开宣战性质的封锁。10 月 24 日苏联船只开始返航，10 月 26 日与 27 日两封莫斯科来信的条件并不一致。10 月 28 日赫鲁晓夫公开同意撤出导弹，美方私下承诺撤走土耳其的朱庇特导弹。危机之后双方建立了直通热线，并在 1963 年签署部分禁试条约。很多学生以为美方完全获胜，实际上公开与私下两部分条件需要分开写。常见的错误是忽略土耳其导弹这一条，导致对等妥协的分析缺一半。
Photographs taken on 14 October 1962 gave Washington proof that missile sites were being built in Cuba, and the quarantine announced on 22 October was worded to avoid the legal meaning of a blockade. Two messages from Khrushchev arrived with incompatible terms, and the public settlement of 28 October was matched by a private understanding on the Jupiter missiles in Turkey. Answers that describe the outcome as an outright American victory usually lose the marks attached to reciprocal concessions, and the hotline agreed in 1963 is the part of the settlement that lasted longest.
布拉格之春与勃列日涅夫主义
捷克斯洛伐克在 1968 年初由杜布切克领导，提出带有人情面孔的社会主义改革。改革包括放松审查、扩大企业自主与联邦化安排，北约与华约都没有被直接挑战。华约部队在 1968 年 8 月 20 日夜进入捷克，改革在数日内被终止。同年 9 月苏方公开提出后来被称为勃列日涅夫主义的原则，即社会主义国家的主权要让位于阵营整体利益。这一原则把东欧的改革空间压缩成一条明确的界线。很多学生以为布拉格之春是军事对抗，其实捷方没有组织抵抗，事件的关键在于政治控制的边界。常见的错误是把入侵时间与匈牙利事件混在一起，两件事相差十二年。
The Prague Spring of 1968 loosened censorship and gave enterprises more room, without formally challenging the Warsaw Pact. Warsaw Pact troops entered Czechoslovakia on the night of 20 August, and the reforms were reversed within days. The doctrine announced in Moscow that September put the interests of the bloc above the sovereignty of any single member.
缓和与赫尔辛基协议：七十年代的三根支柱
美苏在 1972 年签署第一阶段限制战略武器条约与反弹道导弹条约，把进攻性武器数量先固定下来。赫尔辛基协议在 1975 年由三十五个国家签署，把欧洲边界、经济合作与人权分成三个篮子。第三篮的人道条款后来被东欧的异议团体反复引用，成为持续的压力来源。1979 年第二阶段限制战略武器条约虽然签署，却没有得到美国参议院批准。缓和在这一时期同时包含军控、贸易与人员往来，不能只写成气氛变好。很多学生以为赫尔辛基只是承认战后边界，忽略了人权条款的实际作用。阅卷时最能体现深度的一步，是把军控数字与政治信任分开评估。
SALT I and the ABM Treaty of 1972 froze the number of strategic launchers, while the Helsinki Final Act of 1975 traded recognition of European borders for commitments on trade and human rights. The third basket gave dissident groups in eastern Europe a text they could quote back at their governments. Détente therefore rested on arms control, economic contact and civil rights at once, which is why a single sentence about warmer relations rarely earns full marks, and the unratified SALT II shows how easily signature and ratification come apart.
阿富汗与星球大战：缓和的终结
苏联在 1979 年 12 月出兵阿富汗，官方理由是应邀请维稳，实际目标是保住亲苏政权。美国随后推迟第二阶段条约审批，并对苏联实施粮食与科技制裁。里根在 1983 年 3 月提出战略防御倡议，用太空拦截系统作为谈判筹码。同年他称苏联为邪恶帝国，语言上的对抗回到战后初期水平。军备竞赛延伸到中程导弹与常规力量，欧洲成为部署争议的中心。1987 年双方签署中程核力量条约，第一次销毁一整类陆基导弹。常见的错误是把星球大战写成已经建成的系统，它大部分停留在研究阶段，作用在政治与心理层面。
The Soviet intervention in Afghanistan in December 1979 ended the arms control timetable and brought sanctions instead. Reagan's Strategic Defence Initiative of March 1983 was largely a research programme, yet it changed the bargaining position because Moscow feared a defensive shield. The Intermediate Range Nuclear Forces Treaty of 1987 removed an entire class of land based missiles, showing how fast rhetoric and negotiation could trade places, and it was signed in Washington that December.
戈尔巴乔夫与一九九一年：苏联解体
戈尔巴乔夫在 1985 年出任总书记，推出重建与公开性两项改革，试图用松绑解决经济停滞。他在对外政策上放弃对东欧的军事干预承诺，1989 年的东欧剧变因此没有再遇到苏军。柏林墙在 1989 年 11 月 9 日开放，两德在 1990 年 10 月 3 日统一。苏联在 1991 年 8 月发生政变未遂，叶利钦成为实际主导者。同年 12 月八个加盟共和国领导人签署协议，苏联在 12 月 25 日正式终止。很多学生以为苏联解体由外部压力单独造成，内部经济与民族问题是同等重要的原因。常见的错误是把柏林墙开放与德国统一写成同一年，中间隔了将近十一个月。
Gorbachev's reforms after 1985 loosened political control at home and renounced intervention in eastern Europe, which is why the revolutions of 1989 met no Soviet tanks. The wall opened on 9 November 1989 and German unification followed in October 1990. By December 1991 the union itself had been dissolved, a collapse driven as much by economic failure and nationality questions as by pressure from Washington.
题型与评分：AQA 2R 与 Edexcel 9HI0 的版面差别
AQA 的 A-level 历史 7042 把冷战做成独立单元，即 Component 2R，时间范围是一九四五年到一九九一年。这份卷子考试时长两小时三十分，满分八十分，占整个 A-level 的百分之四十。A 部分是必做的史料题，三份材料共三十分，官方建议用一小时。B 部分从三道论述题里选两道，每题二十五分，各用四十五分钟。Edexcel 的 9HI0 没有同名冷战单元，相关内容分散在 Paper 1 的 1E 俄国单元、Paper 3 的 37.1 战争性质与 38.1 现代俄国，以及百分之二十的课程作业里。Edexcel 的 GCSE 1HI0 则把这段历史放在 Paper 2 的选项 26，与英国深度研究合卷，考试一小时四十五分，满分六十四分。选课前要按考试局官网的选项清单核对，不要按主题名硬套。常见的错误是拿 GCSE 那种解释两个后果的小题去准备 A-level 的史料题，两者的分值结构完全不同。
AQA's 7042 specification makes the Cold War a standalone depth study, Component 2R, examined in two and a half hours for 80 marks and 40 per cent of the qualification. Edexcel's 9HI0 has no option with that name, so the same content sits inside the Russia breadth study on Paper 1, options 37.1 and 38.1 on Paper 3, and the coursework. Checking the official option list before choosing a course avoids the common mistake of preparing for a paper structure that does not exist.
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