Military achievements
Upon Thutmose's coronation, Nubia rebelled against Egyptian rule. According to the tomb autobiography of Ahmose, son of Ebana, Thutmose traveled up the Nile and fought in the battle, personally killing the Nubian king. Upon victory, he had the Nubian king's body hung from the prow of his ship, before he returned to Thebes. After that campaign, he led a second expedition against Nubia in his third year in the course of which he ordered the canal at the first cataract—which had been built under Sesostris III of the 12th Dynasty—to be dredged in order to facilitate easier travel upstream from Egypt to Nubia. This helped integrate Nubia into the Egyptian empire. This expedition is mentioned in two separate inscriptions by the king's son Thure:
Year 3, first month of the third season, day 22, under the majesty of the King of Upper and Lower Egypt, Aakheperre who is given life. His Majesty commanded to dig this canal after he found it stopped up with stones [so that] no [ship sailed upon it];
Year 3, first month of the third season, day 22. His Majesty sailed this canal in victory and in the power of his return from overthrowing the wretched Kush.
In the second year of Thutmose's reign, the king cut a stele at Tombos, which records that he built a fortress at Tombos, near the third cataract, thus permanently extending the Egyptian military presence, which had previously stopped at Buhen, at the second cataract.
The conquest of Megiddo. The victory was commemorated in reliefs at Karnak depicting the conquered cities and their rulers as captives. Each city was shown as a bound figure with "arms bound behind the back", explicitly identified as Syrian. In accompanying scenes, Thutmose III is portrayed grasping "kneeling Asiatics" "by the hair" and "in the act of smiting with his mace", while deities present "the various Syrian towns in fetters" to the king, reinforcing the imagery of physical domination and submission.
The rulers were required to provide hostages and engage in dynastic submission, and "many a Syrian king's daughter was received into the harem of the pharaoh", reinforcing Egyptian control through elite incorporation and marriage politics. Textual sources from the time of Thutmose I include references to Retenu, Naharin, and the 'land of Mitanni'. The last is believed to be the first historical reference to that kingdom.
Many Levantine sites were destroyed in the middle of the 16th century BC, and these destructions have often been attributed to the military campaigns of Thutmose I, or of his predecessor Amenhotep I. Initially these campaigns may have aimed at defeating the power of the Hyksos, who were formerly strong in this area.As many as 20 sites in the Levant suffered destruction at this time. For example, the fiery destruction of Stratum XVIII at Gezer has been assigned to the second half of the 16th century BC, the time of Amenhotep I and Thutmose I, based on the pottery and scarabs discovered in the destruction debris.
It does not appear that the Egyptians' aim at this stage was to control the area permanently, because they established no permanent presence in the area. This happened later, during the 18th dynasty.
Thutmose had to face one more military threat, another rebellion by Nubia in his fourth year. His influence accordingly expanded even farther south, as an inscription dated to his reign has been found as far south as Kurgus, south of the fourth cataract. He inscribed a large tableau on the Hagar el-Merwa, a quartz outcrop c. 40 m (130 ft) long and 50 m (160 ft) wide 1200 meters from the Nile, on top of several local inscriptions. This is the furthest south the Egyptian presence is attested. During his reign, he initiated a number of projects that effectively ended Nubian independence for 500 years. He enlarged a temple to Sesostris III and Khnum, opposite the Nile from Semna. There are also records of specific religious rites the viceroy of El-Kab was to have performed in the temples in Nubia in proxy for the king. He also appointed a man called Turi to the position of viceroy of Kush, also known as the "King's Son of Cush". With a civilian representative of the king permanently established in Nubia, Nubia did not dare revolt as often as it had and was easily controlled by future Egyptian kings.