8 sentences with “twenty”

What followed was twenty years of warfare between the Byzantines and the Gothic kingdom in Italy.

The "discoverer of comets" spent his last twenty years at the head of an observatory through which he studied the moon.

Diocletian not only managed to survive for twenty years after taking the throne, but also reorganised the empire and pulled it back from the brink.

In contrast, during the empire, legionaries served for twenty years and then were placed in reserve for another five, although more than half died before reaching retirement age.

Penelope, wife of the Greek hero Odysseus, is depicted as waiting faithfully for twenty years for Odysseus to return from the invasion of Troy despite a legion of suitors trying to win her and Odysseus' lands.

For twenty years, the Carthaginians built up their forces and resources, notably by invading and conquering much of Spain, which contained rich gold and copper mines and thousands of Spanish Celts who came to serve as mercenaries in the Carthaginian armies.

When a man reached the age of twenty, assuming he was judged worthy, he was elevated to the rank of "Equal" - a full Spartan citizen - and received a land grant that ensured he could concentrate on military discipline for the rest of his life without having to worry about earning a living.

Before the age of twenty, Halley had already focused his interest on observing the stars of the southern hemisphere, establishing the first astronomical observatory in that hemisphere on the island of St. Helena, Africa. This enabled him to publish a list of nearly 350 stars never before observed.