Excerpts from Books and Wikipedia
"The Battle of Megiddo (…) was fought between Egyptian forces under the command of Pharaoh Thutmose III and a large rebellious coalition of Canaanite vassal states led by the king of Kadesh. . . . By reestablishing Egyptian dominance in the Levant, Thutmose III began a reign in which the Egyptian Empire reached its greatest expanse." [Wikipedia] "During his eighth such campaign, he fought and defeated the Mitanni on the other side of the upper Euphrates, taking Egypt to the limits of its empire. This completely transformed Egypt as a nation. The wealth that came into Egypt in the form of annual tribute was so massive that it allowed for the construction of temples and public buildings for which Egypt is best known today, barring only the Pyramids and Sphinx. . . . Two hundred years after Thutmose III, Rameses II fought to maintain the borders of the empire. No pharaoh fought as often as he, but by the thirteenth century B.C. the power of Egypt had reached its height. From then onward, the Sea Peoples, the Hittites, the Assyrians, the Persians, the Greeks, and finally the Romans all either weakened Egypt or exercised dominion over Egypt." [Davis: 100 Decisive Battles, p. 5]