The Silurian period was between 443.7 - 416 million years ago, which means that it lasted around 27.7 million years.
The middle Paleozoic era is known as the Devonian period. The period ended with the death of many species of vertebrate life. During this time, many life forms transitioned from living in the water to living on land.
The Mesozoic Period (251 - 65 million years ago) lasted approximately 216 million years. It consisted of the Triassic Period (251 - 200 million years ago), the Jurassic Period (199-146 million years ago) and the Cretaceous Period (145 - 65 million years ago).
The Roman monarchy lasted for 244 years, form 753 B.C. to 509 B.C. there were seven kings in this period.
The Gothic period of literature lasted about 100 years. It began in the latter part of the 18th century and ended about 1900.
The war lasted 50 years - two generations. There were obviously many leaders on both sides. Which period did you have in mind?
The middle ages in Europe lasted for a thousand years and involved many different countries. There was no one king over that period.
The Civil War lasted four years. From 1861 to 1865.
The Roman Republic lasted 482 years.
it lasted 2 years.
about two hundred years
The war lasted for 6 years
70 years.