Historical precedents

Investigate what happened in comparable episodes. Search recorded events, compare up to three side by side, and follow the sources behind each account.

Each registry states its own provenance, because the two kinds are not the same evidentiary object. Hand-verified registries were researched and written by hand, with every figure index-linked to a primary source. Compiled registries were rendered by a script out of one named academic dataset and have not been individually checked. They are never mixed inside a registry, and the label is on every page.

1. Choose a registryStart with a research question and check which events the source includes.

2. Compare the evidenceFilter recorded facts, then read the differences between selected events.

3. Keep your researchSave an event with notes or export a comparison with its source links.

Maritime chokepoint closures

Hand-verified

The last times a critical strait or canal was closed

12 events · 1806–2023

Hand-verified against primary sources

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Interstate armed conflicts

Compiled, not verified

The last times two states' armed forces fought each other

53 conflicts · 1946–2025

Compiled from UCDP/PRIO Armed Conflict Dataset v26.1 — not individually verified

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