empireLarge political structure or a large extensive group
Definitions:
An extensive group of states or countries under a single supreme authority "The Roman empire was vast and powerful."
declineGradual loss of power, prosperity, or status
Definitions:
Become smaller, fewer, or less; decrease"The influence and power of the Roman empire began to decline."
A gradual and continuous loss of strength, numbers, quality, or value"The decline of the Roman empire was partly due to economic instability."
senateA council of citizens in Ancient Rome
Definitions:
Any of various legislative or governing bodies, in particular."The Roman senate lost its influence over the army."
invasionAn instance of invading a country or region
Definitions:
An instance of invading a country or region with an armed force"The Roman empire fell due to the invasion of the foot soldiers."