When a big civilization falls, and a new one rises.
ex: the power of the Romans and Greeks fell, Dark ages started.
In China the era of dynasties started in 2100 BC
Mesolithic
The Era of Jazz began in the 1920's.
Yes, The Victorian era was 1837-1901 and the Edwardian era was 1901-1910 Because the Victorian era is named after Queen Victoria, and the Edwardian after her son who came to the throne on her death
the new name of era came to be called renaissance
9500 BC.
the mesoproterozoic was an era itself not a period.
in the era of awesomeness when dinosaurs were alive.
Classical era
The swing era in jazz started in the year of 1935
In China the era of dynasties started in 2100 BC
The NHL's modern era began in 1992.
The relationship era began in the early 20th century with the rise of modern dating practices and the shift towards more individual choice in selecting partners. This era marked a departure from traditional arranged marriages and gave individuals more agency in their romantic relationships.
President Nixon.
1824
Mesolithic
1811