Because Athens and Sparta, both powerful Greek city-states, had fought as allies in the Greco-Persian Wars between 499 and 449 B.C. In the wake of the Persian retreat, however, Athens grew more powerful and tensions rose, escalating into nearly three decades of war. Sparta emerged victorious, while the constant fighting left Athens bankrupt, exhausted and demoralized. Neither city-state regained the military strength they once had
No, it is false that political conventions mostly take place on a national level, because states have mostly abandoned their use because of issues with fraud and corruption, since the most important conventions take place at the state level.
1.Narmer is credited with unification of Egypt.
2.Menes is the first king of unified Egypt.
3.The oldest known pyramid in Egypt was built for the third dynasty's King Djoser.
4. The Egyptian pharaoh khufu built the great pyramid.
5. Gifts included water, transportation, trade, papyrus, fish and other animals, and rich black soil.
Answer: what’s the question I could try n find the answer
explanation.