They both collapsed.
A rebellion war broke out.
Rome collapsed because of internal weaknesses, not because of attacks from foreign invaders.
The Senate continued on, except that when this collapsed, a Dictator was appointed for six months to resolve the crisis and he appointed a Master of Horse to assist him.
The Kingdom of Rome was founded in 753 BCE. The Roman Republic replaced it in 509 BCE. The Empire formed in 27 BCE. Western Rome collapsed in 476 CE. The Byzantine Empire fell to the Turks in 1453 CE.
The synonym for collapsed is fell.
No one. Rome collapsed over a period of many decades, making it unable to maintain its colonies. Between 376 and 395 CE, an already weakened Rome suffered invasions and internal battles. By the beginning of the 5th century CE, there were revolts; Rome was besieged by the Visigoths, and there was starvation in Italy.
Rome was not built in a day, and neither did it fall in one. The Empire's collapse came after decades of invasions from a myriad of sides, but primarily due to the marauding Germanic barbarian tribes. As different groups of Germans invaded the deflating Roman territories, they settled in many different areas: the Vandals in North Africa (Tunisia), the Franks in Gaul (France), and different varieties of Goths throughout what is now Spain and Italy. To answer the question directly, it was a patchwork of kingdoms divided up among the different German tribes that had invaded as Rome collapsed.
An adjective modifies a noun. The adjective forms are collapsible and collapsed.The collapsible sofa becomes a bed.The collapsed barn would have to be rebuilt.
The building collapsed in the earthquake.
It depends. In the case of "A collapsed building." it is an adjective. It can however be used as the past tense version of "to collapse" as in "I collapsed" or "This building collapsed yesterday." in which case it is indeed a verb.
No it wasn't seen before they collapsed, it was seen and photographed just after they collapsed.