- Military strength: Empires often have强大军事力量，可以用来征服和控制领土.
- Economic power: Empires often have strong economies that can support their military and administrative apparatus.
- Political stability: Empires often have stable political systems that can maintain control over large and diverse populations.
- Cultural hegemony: Empires often have dominant cultures that can be used to assimilate conquered peoples.
- Geographic advantage: Empires often have favorable geographic positions that make them difficult to invade or control.
- Alliances and diplomacy: Empires often form alliances with other states and use diplomacy to maintain their power and influence.
- Religion: Empires often use religion to legitimize their rule and to control the population.
- Technology: Empires often have superior technology that can be used to maintain their military and economic优势.
- Administrative efficiency: Empires often have efficient administrative systems that can effectively manage large and complex territories.