[Glossary](/glossary.md)/[Progression](/glossary/category/progression.md)

# Tech tree

A nation's chart of researchable vehicles, where each one unlocks the vehicles above it.

Also known as tech trees, research tree, vehicle tree.

Every nation has a tree of branches running from [Tier](/glossary/tier.md) I up to Tier X, split by class. [Researching](/glossary/research.md) a vehicle unlocks whatever sits above it, so reaching a specific Tier X means grinding the specific line that leads to it.

Branches share vehicles where the historical lines converged, which is why an unusual route through a tree is sometimes cheaper than the obvious one.

## Related terms

[ResearchSpending a vehicle's experience to unlock its modules and the vehicles that follow it in the tree.](/glossary/research.md)[ExperienceThe currency earned per battle from damage, spotting, kills, capture and defence, spent on research and crew training.](/glossary/experience.md)[TierA vehicle's rank from I to X, which sets its power level, its battle tier spread and everything about its economy.](/glossary/tier.md)[BlueprintFragments collected from battles that reduce the experience needed to research a specific vehicle, or any vehicle of a nation.](/glossary/blueprint.md)

[Every World of Tanks term](/glossary.md)

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