Great Wall of China · describe its defensive system

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HistoryOne small aha

Your new ahaA network of fortifications and defenses built over many centuries.

The Great Wall is a system of fortifications built and rebuilt by different dynasties. Source: Great Wall of China ↗

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68Archaeology · the subject and evidence this discipline studiesRECALL
Human life through material remains.
Objects, buildings, landscapes, bones, and fragments can all help reconstruct the past.
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69Primary source in history · defining relationship to the period studiedRECALL
Evidence created close to the time being studied.
A letter, law, photograph, object, or recording can be primary evidence depending on the question.
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70Comparing historical sources · explain why a single account is not enoughRECALL
To test perspective, bias, and missing context.
A source can be valuable without being complete or neutral.
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