Title: Cradle of civilization
Content:  Canaan and the Byblos coast, during this time. Concurrent with these cultural advances, a process of unification of the societies and towns of the upper Nile River, or Upper Egypt, occurred. At the same time the societies of the Nile Delta, or Lower Egypt, also underwent a unification process. During his reign in Upper Egypt, King Narmer defeated his enemies on the Delta and merged both the Kingdom of Upper and Lower Egypt under his single rule. The Early Dynastic Period of Egypt immediately followed the unification of Upper and Lower Egypt. It is generally taken to include the First and Second Dynasties, 
Title: Osiris myth
Content:  with political events early in Egypt's history or prehistory. The cases in which the combatants divide the kingdom, and the frequent association of the paired Horus and Set with the union of Upper and Lower Egypt, suggest that the two deities represent some kind of division within the country. Egyptian tradition and archaeological evidence indicate that Egypt was united at the beginning of its history when an Upper Egyptian kingdom, in the south, conquered Lower Egypt in the north. The Upper Egyptian rulers called themselves "followers of Horus", and Horus became the patron god of the unified nation and its kings. Yet Horus and Set cannot be easily 
Title: Early Dynastic Period (Egypt)
Content:  Nile Delta, or Lower Egypt also underwent a unification process. Warfare between Upper and Lower Egypt occurred often. During his reign in Upper Egypt, King Narmer defeated his enemies on the Delta and merged both the Kingdom of Upper and Lower Egypt under his single rule. Narmer is shown on palettes wearing the double crown, composed of the lotus flower representing Upper Egypt and the papyrus reed representing Lower Egypt - a sign of the unified rule of both parts of Egypt which was followed by all succeeding rulers. In mythology, the unification of Egypt is portrayed as the falcon-god, called Horus and identified with Lower Egypt, as conquering and subduing the god Set, who was identified with Upper 
Title: Lower Egypt
Content:  began to grow and advance rapidly toward refined civilization. A new and distinctive pottery, which was related to the pottery in the Southern Levant, appeared during this time. Extensive use of copper became common during this time. The Mesopotamian process of sun-dried bricks, and architectural building principles—including the use of the arch and recessed walls for decorative effect—became popular during this time. Concurrent with these cultural advances, a process of unification of the societies and towns of the upper Nile River, or Upper Egypt, occurred. At the same time, the societies of the Nile Delta, or Lower Egypt also underwent a unification process. Warfare between Upper Egypt and Lower Egypt occurred often. During his reign in Upper Egypt, King Narmer defeated his enemies in the Delta and merged the kingdoms of Upper Egypt and Lower Egypt under his single rule.
Title: History of ancient Egypt
Content:   The historical records of ancient Egypt begin with Egypt as a unified state, which occurred sometime around 3150 BC. According to Egyptian tradition, Menes, thought to have unified Upper and Lower Egypt, was the first king. This Egyptian culture, customs, art expression, architecture, and social structure were closely tied to religion, remarkably stable, and changed little over a period of nearly 3000 years. Egyptian chronology, which involves regnal years, began around this time. The conventional chronology was accepted during the twentieth century, but it does not include any of the major revision proposals that also have been made in that time. Even within a single work, archaeologists often offer several possible dates, 
Title: Upper Egypt
Content:  Upper Egypt (صعيد مصر Ṣaʿīd Miṣr, shortened to الصعيد,, locally: ; ) is the southern portion of Egypt and is composed of the lands on both sides of the Nile that extend downriver between Nubia and Lower Egypt in the north. In ancient Egypt, Upper Egypt was known as tꜣ šmꜣw, literally "the Land of Reeds" or "the Sedgeland". It is believed to have been united by the rulers of the supposed Thinite Confederacy who absorbed their rival city states during Naqada III and its unification with Lower Egypt ushered in the Early Dynastic period. Both Upper and Lower Egypt became imbedded within the symbolism of the sovereignty in Ancient Egypt such as the Pschent double crown. Upper Egypt remained as a historical distinction even after the classical period.
Title: Upper and Lower Egypt
Content:  In Egyptian history, the Upper and Lower Egypt period (also known as The Two Lands) was the final stage of prehistoric Egypt and directly preceded the unification of the realm. The conception of Egypt as the Two Lands was an example of the dualism in ancient Egyptian culture and frequently appeared in texts and imagery, including in the titles of Egyptian pharaohs. The O zmꜣ-tꜣwj (Egyptological pronunciation sema-tawy) is usually translated as "Uniter of the Two Lands" and was depicted as a human trachea entwined with the papyrus and lily plant. The trachea stood for unification, while the papyrus and lily plant represent Lower and Upper Egypt. Standard titles of the pharaoh included the prenomen, quite literally "Of the Sedge and Bee" (nswt-bjtj, the symbols of Upper and Lower Egypt) and "lord of the Two Lands" (written nb-tꜣwj). Queens regnant were addressed as pharaohs and male. Queens consort might use a feminine versions of the second title, "lady of The Two Lands" (nbt-tꜣwj), mistress of the Entire Two Lands (hnwt-tꜣwy-tm), and mistress of the Two Lands (hnwt-tꜣwy).
Title: Early Dynastic Period (Egypt)
Content:   The Archaic or Early Dynastic Period of Egypt (also known as Thinite Period, from Thinis, the supposed hometown of its rulers ) is the era immediately following the unification of Upper and Lower Egypt c. 3100 BC. It is generally taken to include the First and Second Dynasties, lasting from the end of the Naqada III archaeological period until about 2686 BC, or the beginning of the Old Kingdom. With the First Dynasty, the capital moved from Thinis to Memphis with a unified Egypt ruled by an Egyptian god-king. Abydos remained the major holy land in the south. The hallmarks of ancient Egyptian civilization, such as art, architecture and many aspects of religion, took shape during the Early Dynastic Period. Before the unification of Egypt, the land was settled with autonomous villages. With the early dynasties, and for much of Egypt's history thereafter, the country came to be known as the Two Lands. The pharaohs established a national administration and appointed royal governors. The buildings of the central government were typically open-air temples constructed of wood or sandstone. The earliest Egyptian hieroglyphs appear just before this period, though little is known of the spoken language they represent.
Title: Horus
Content:  which the combatants divide the kingdom, and the frequent association of the paired Horus and Set with the union of Upper and Lower Egypt, suggest that the two deities represent some kind of division within the country. Egyptian tradition and archaeological evidence indicate that Egypt was united at the beginning of its history when an Upper Egyptian kingdom, in the south, conquered Lower Egypt in the north. The Upper Egyptian rulers called themselves "followers of Horus", and Horus became the tutelary deity of the unified polity and its kings. Yet Horus and Set cannot be easily equated with the two 
Title: Upper and Lower Egypt
Content:  Ancient Egypt was divided into two regions, namely Upper Egypt and Lower Egypt. To the north was Lower Egypt, where the Nile stretched out with its several branches to form the Nile Delta. To the south was Upper Egypt, stretching to Aswan. The terminology "Upper" and "Lower" derives from the flow of the Nile from the highlands of East Africa northwards to the Mediterranean Sea. The two kingdoms of Upper and Lower Egypt were united c. 3000 BC, but each maintained its own regalia: the hedjet or White Crown for Upper Egypt and the deshret or Red Crown for Lower Egypt. Thus, the pharaohs were known as the rulers of the Two Lands, and wore the pschent, a double crown, each half representing sovereignty of one of the kingdoms. Ancient Egyptian tradition credited Menes, now believed to be the same as Narmer, as the king who united Upper and Lower Egypt. On the Narmer Palette the king is depicted wearing the Red Crown in one scene and the White crown in another, and thereby showing his rule over both Lands.

Question: the initial unification of upper and lower egypt took place during which period?
Answer: 3000 BC.
c. 3000 BC.