Question

what do you understand by periodisation in history

Answer 1

periodisation refers to sorting out and placing historical moments according to their happening dates

Answer 2

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British had preserved official documents, because they thought if they write and record everything, it will later be easier for them to study them and debate. They kept official records of what they thought was right, so that in the future, those records can serve as proofs of all the decisions that they had taken.