Lesson Plan: The Reinsurance Treaty

Subjects: History (Bismarckian Germany, the late 19th century European alliance system, the origins of the First World War), Civics (treaty diplomacy, balance of power, the secret protocol as a tool of statecraft), Current Events (US-China-Russia relations in 2026, the consecutive Trump and Putin visits to Beijing), International Relations theory (alliance management, the security dilemma, the role of one indispensable diplomat).

Recommended grade: 10-12 (high school) and undergraduate History, Political Science, International Relations, and Diplomatic History electives.

Duration: Two 50-minute sessions, or one 90-minute block.

---

Learning Objectives

By the end of this lesson, students will be able to:

1. Identify the three legs of Bismarck's alliance system: the Dual Alliance with Austria-Hungary (1879), the Dreikaiserbund (1873-78, revived 1881-87), and the Reinsurance Treaty with Russia (1887-90).

1. Explain the carve-out structure of the Reinsurance Treaty: mutual neutrality unless Germany attacked France first, or Russia attacked Austria-Hungary first.

1. Describe the secret protocol of the Reinsurance Treaty and its commitment regarding the Bosphorus and the Dardanelles.

1. Trace the cascade after Bismarck's dismissal in March 1890: Russia's rebuffed renewal request, the lapse of the Reinsurance Treaty on 18 June 1890, the Franco-Russian Alliance of 1894, the Entente Cordiale of 1904, the Anglo-Russian Convention of 1907, and the First World War of 1914-1918.

1. Compare and contrast Bismarck's 1887 secret bilateralism with the 2026 Chinese practice of receiving the American president and the Russian president in the same capital within a week.

1. Reason about the conditions under which a balancer state can maintain ties with two natural rivals, and the conditions under which the balance collapses.

---

Session 1: Bismarck's Bookkeeping

Warm-up (5 minutes)

Show students a simple map of Europe in 1887 with three countries marked in colour: Germany, Austria-Hungary, Russia. Ask: "Germany is publicly allied with Austria-Hungary. Austria-Hungary's biggest rival is Russia. So what is Germany's relationship with Russia, and how can both relationships be true at once?"

Solicit answers. Steer toward the concept of balance of power as a system in which a state may maintain ties with two rivals at once to keep the larger system stable.

Define secret protocol: a hidden clause attached to a public treaty, known only to the signatories' inner circles, that commits the parties to actions that contradict or extend the public treaty's terms.

Reading (10 minutes)

Distribute the first half of "The Reinsurance Treaty" (up to "Now look at this week in Beijing"). Students read silently.

Discussion (15 minutes)

Whole-class:

• Who signed the Reinsurance Treaty on 18 June 1887? (Herbert von Bismarck, State Secretary of the German Foreign Office and son of Chancellor Otto von Bismarck, on the German side; Pavel Andreyevich Shuvalov, Russian Ambassador to Berlin, on the Russian side.)

• What were the two main provisions in the body of the treaty? (Mutual neutrality if either party was at war with a third great power; carve-outs for an offensive German war against France or an offensive Russian war against Austria-Hungary.)

• What was the secret protocol about? (German recognition of Russia's special interest in Bulgaria and German commitment to remain benevolently neutral if Russia took action regarding the Bosphorus and the Dardanelles, in particular to prevent Ottoman closure of those straits against Russia.)

• Why did Bismarck want the treaty? (He believed Germany's central European position made a war on two fronts the strategic nightmare; he believed a Russia driven into the arms of France was the worst possible outcome; he wanted Russia tied to Berlin even as Germany was formally bound to defend Austria-Hungary against Russia.)

• How can the treaty be honest if Germany was already pledged to Austria-Hungary against Russia? (It cannot be, in the conventional sense. The Reinsurance Treaty was honest only within the carve-out structure: Germany would not assist Russia in an offensive war against Austria-Hungary, but would not assist Austria-Hungary in an offensive war against Russia either. Bismarck was committed to making sure both wars were defensive, and to using his diplomacy to head off either.)

Hands-on activity: build the alliance system (15 minutes)

Working in pairs, students draw a diagram showing the Bismarckian system as it stood on 19 June 1887, the day after the Reinsurance Treaty was signed:

1. Germany (centre).

1. Austria-Hungary (right): bound to Germany by the public Dual Alliance of 1879.

1. Russia (right of Austria-Hungary): bound to Germany by the secret Reinsurance Treaty, secretly aware of, but not party to, the Dual Alliance.

1. France (left): diplomatically isolated, no major allies.

1. Britain (top): in "splendid isolation," uncommitted to continental alliances.

1. Italy (lower right): joined Germany and Austria-Hungary in the Triple Alliance of 1882.

1. Ottoman Empire (lower right): the unstable third party whose Balkan provinces were the source of every great-power dispute in the region.

Then they label the diagram with the question: "Which great power, if any, would be likely to declare war on which other great power in 1887, and why is the answer 'none'?"

(Expected: the system was stable because every potential war required one party to overcome both an opponent and the Bismarckian system's diplomatic costs. Germany would not back Austria in an offensive war on Russia; Russia would not back France in a war on Germany; France could not find allies; Britain stayed out. Bismarck had designed peace.)

Exit ticket (5 minutes)

One sentence: "Why did Bismarck go to the trouble of signing a secret treaty with Russia when his country was already publicly allied with Austria-Hungary against Russia?"

(Expected: because he wanted to keep both relationships in force at once, on the assumption that Russia driven to France would produce a worse strategic position for Germany than any honest single alliance would. The Reinsurance Treaty existed precisely because Bismarck refused to choose between Vienna and Saint Petersburg.)

---

Session 2: After Bismarck

Warm-up (5 minutes)

Show students a photograph of Bismarck near the end of his career (an 1894 portrait) and a photograph of the young Kaiser Wilhelm II at approximately the same period. Ask: "What might happen to a system held together by one man's bookkeeping when that man is dismissed?"

Reinforce the role of personality and continuity in diplomatic systems. Then read the famous Bismarck quote on the Balkans: "not worth the healthy bones of a single Pomeranian grenadier."

Reading (10 minutes)

Distribute the second half of "The Reinsurance Treaty" (from "Now look at this week in Beijing"). Students read silently.

Discussion (20 minutes)

Whole-class:

• Who became German emperor on 15 June 1888 after the deaths of Wilhelm I (9 March 1888) and Friedrich III (15 June 1888 after a 99-day reign)? (Wilhelm II, age 29.)

• When did Wilhelm II dismiss Bismarck? (March 1890. The formal resignation was accepted on 20 March 1890.)

• Who was Bismarck's successor as chancellor, and what did he decide about the Reinsurance Treaty? (Leo von Caprivi. He refused Russia's formal request for renewal in May 1890. The treaty lapsed on 18 June 1890.)

• Who was Friedrich von Holstein and why does he matter? (The Political Director of the German Foreign Ministry, the foreign-policy professional who survived Bismarck's dismissal. He had always disliked the Reinsurance Treaty's secrecy and complexity, and he advised Caprivi to let it lapse on the grounds that it complicated Germany's position with Austria.)

• What was the cascade after 1890? (Russia, freed from its German tie, turned to France. The Franco-Russian Alliance was ratified on 4 January 1894. Britain joined France in the 1904 Entente Cordiale. Britain joined Russia in the 1907 Anglo-Russian Convention. The three together formed the Triple Entente that opposed the Triple Alliance at the outbreak of the First World War in August 1914.)

• What is the central historians' debate about Bismarck's system and 1914? (Whether, if Wilhelm II had not dismissed Bismarck and had not let the Reinsurance Treaty lapse, the alliance system that produced the First World War could have been avoided, or at least postponed for another generation. The debate is now over a hundred years old.)

• Now to Beijing this month: what is the structural parallel? (Trump's visit to Xi on 13-15 May 2026 followed by Putin's visit to Xi on 19-20 May 2026 puts China in the position of Bismarck. Trump's no-treaty visit is China's Reinsurance Treaty with the US. The 4 February 2022 "no-limits" partnership with Russia is China's Dual Alliance. China maintains both. It does not want to choose.)

• What is the open question the essay leaves? (Who plays Wilhelm II, and when. The Reinsurance Treaty lapsed three years after it was signed, the moment its author was dismissed. The "no-limits" partnership is now four years and three months old. The Trump-Xi summit is one week old. The balance is held by one man.)

Hands-on activity: write the foreign-ministry memo (15 minutes)

Working in groups of three or four, students role-play as the German Foreign Ministry in May 1890. Russia has just proposed renewal of the Reinsurance Treaty. The new chancellor Caprivi has asked his political directorate to write a one-paragraph memo recommending either renewal or non-renewal, with the reasoning that would be given to Wilhelm II.

The memo must:

1. State the recommendation in one sentence.

1. Give one argument for renewal (that the political director Friedrich von Holstein might have made if he had favoured it).

1. Give one argument against renewal (Holstein's actual position).

1. Identify one consequence of renewal that the writer foresees.

1. Identify one consequence of non-renewal that the writer foresees.

Each group reads its memo aloud. The class debates which memo Wilhelm II would have found most persuasive in 1890, and which memo a historian writing in 1920 would have wished had been written.

Exit ticket (5 minutes)

Two sentences:

1. Name one feature of Bismarck's 1887 system that is genuinely the same as Xi Jinping's 2026 position.

1. Name one feature that is genuinely different.

(Expected: shared features include both states playing balancer between two natural rivals, both maintaining a public alliance with one party and a tactical accommodation with the other, and both run by a leader who personally manages the system rather than delegating it. Different features include the publicity: in 1887 the Reinsurance Treaty was secret because European diplomacy still ran on secret bilateral protocols; in 2026 Xi receives both visitors publicly in the same week, and the partnership with Russia is openly described as "no-limits." The 2026 version is balance-by-publicity rather than balance-by-secrecy. Whether that makes it more or less stable than Bismarck's system is itself the open question.)

---

Optional extension: comparative balancer systems

Students choose one other historical balancer system and write a one-page comparison with Bismarck's 1887 system:

• Lord Castlereagh and the Congress of Vienna (1814-15), which kept the great-power peace through 1854.

• Talleyrand at the same Congress, playing the divided losers off against the unified winners.

• Cardinal Richelieu in the Thirty Years' War, supporting Protestant princes against Habsburg Spain despite being a Catholic cardinal.

• Disraeli at the Congress of Berlin (1878), brokering the post-Russo-Turkish War settlement.

• Henry Kissinger's triangular diplomacy with China and the Soviet Union (1971-74).

Comparison criteria: who was the balancer; what were the two rivals being balanced; what tools did the balancer use (secret treaties, marriage diplomacy, public conferences, back-channels); how long did the system last after the balancer left office.

---

Vocabulary

• Reinsurance Treaty (Rückversicherungsvertrag): the 18 June 1887 secret three-year treaty between Germany and Russia

• Dual Alliance (Zweibund): the 7 October 1879 public defensive alliance between Germany and Austria-Hungary

• Dreikaiserbund (Three Emperors' League): the 1873 and 1881 agreements binding Germany, Austria-Hungary and Russia

• Triple Alliance: the 1882 alliance of Germany, Austria-Hungary and Italy

• Triple Entente: the 1907 informal alignment of France, Britain and Russia

• Franco-Russian Alliance: the 1894 alliance that ended France's diplomatic isolation

• Entente Cordiale: the 8 April 1904 series of agreements between Britain and France

• Anglo-Russian Convention: the 31 August 1907 settlement of British-Russian disputes in Persia, Afghanistan and Tibet

• Secret protocol: a hidden clause attached to a public treaty

• Casus foederis: the conditions under which an alliance treaty's mutual-aid clause is triggered

• Balance of power: an international system in which no single state is strong enough to dominate, achieved through countervailing alliances

• "No-limits" partnership: the 4 February 2022 joint declaration by Xi and Putin in Beijing days before Russia's invasion of Ukraine

• Wilhelmstrasse: the central Berlin street housing the German Foreign Ministry and the Chancellery, used in diplomatic shorthand to mean the German foreign-policy establishment

---

Teacher's note on neutrality

The essay does not endorse Bismarck's authoritarian domestic regime or his Kulturkampf; nor does it endorse Wilhelmine Germany's later imperialism that led to the First World War. It does not endorse Xi Jinping's foreign policy or Putin's invasion of Ukraine or Trump's economic agenda. The structural argument is offered as a historical observation: balancer states throughout modern history have faced the same challenge, and the lesson of Bismarck's system is that personal diplomacy can hold a difficult position together for a generation but rarely longer. The 2026 parallel is offered as a question about the durability of Xi's balance, not a prediction. Encourage students to evaluate the comparison on its structural merits and to take both readings of the historians' debate (Bismarck-as-genius and Bismarck-as-lucky) seriously. The interesting answer is that we did not know in 1888 whether the Reinsurance Treaty would hold or fall, and we do not know in 2026 whether the current Chinese balance will hold or fall either.