What occurred after the unifixation of upper and lower Egypt pls help

The first dynasty was created

Explanation:

The first dynasty was started during the Early Dynasty Period after the unification of lower and upper Egypt by Menes (some evidence say Narmer was the one who unified, but historians suggest it was the same person). This has happened during the stage of prehistoric Egypt, somewhere around 34th or 30th century BC.

The capital of unified Egypt was Thinis. The historical evidence says that the First Dynasty rulers were pretty effective and beloved, without many troubled regimes. There are not many foundings in this era, and those that exist are still mysteries for many archeologists. The last rulership of the First Dynasty has probably ended around 2900 BC, and then the Second Dynasty of Egypt started.

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can you explain it better