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An often overlooked, yet very important, environmental process in world history is known as the “Late Antique Little Ice Age,” which took place during the 6th century A.D. across most of the Northern Hemisphere and received its name because it was shorter and less well-known than the Little Ice Age, which took place from the 16th-19th centuries.

During the first half of the 1st millennium CE, an empire arose in Persia that extended its power and influence to Mesopotamia in the east, Arabia in the south, the Caucasus Mountains in the north, and as far east as India. This empire, known alternatively as the Sasanian Empire or Sassanid Empire, was the last of three great dynasties in Persia—the Achaemenid and the Parthian being the first two dynasties—before the rise of Islam.

Since the Battle of the Little Bighorn, George Armstrong Custer has possessed one of the most unique places in American history. Although he was a capable cavalry officer who served honorably during the Civil War, he remains one of the most instantly identifiable and famous military men in American history due to the fact he was killed during one of the country's most well-known and ignominious defeats: the Battle of Little Bighorn.

Freedom of the press isn’t just a fundamental right in America but a key part of the democratic process. When the United States secured its independence against Britain in the War of Independence in 1783, there was no certainty about what the new country would look like in terms of national governance. In 1787, delegates from the various states convened in Philadelphia to draft a constitution that would define this.

Since the early days of human warfare, which may date back to the Stone Age, combatants have sought to gain an advantage through the acquisition of secret information. With the growth of technology, a parallel advantage was sought through the application of numerous types of torture. In the 19th century, the concept of manipulation was added to military tactics, an attempt to influence the minds of assassins, double agents, and world leaders alike to act against their natures.

Although all the titles of the Nag Hammadi library are not known, many people have heard about its most famous components: The Gospel of Thomas - at one time it was discussed whether it should be included in the New Testament - and The Gospel of Philip, which tried to revive the debate around the identity of Mary Magdalene: "Why do you love her more than all of us?" asks a disconcerted Peter to Jesus. Finally, the Nag Hammadi texts have led many scholars to reconsider the rigid canons imposed by the early Church, and the readers to find a more intimate religion that turned upside down many postulates of Christian orthodoxy.

Most adults alive today either remember or have heard of the turbulent 1960s, but far fewer are familiar with the similarities those more recent protests had with the earlier unrest of a century earlier. Although the Civil War is remembered as the seminal event of American history, and it is often portrayed as the Lincoln administration and the North fighting bravely to preserve the Union and ultimately end slavery, the truth at the time was far more complicated.

During the last 100 years, Susan B. Anthony has been one of the most venerated women in American history. In the process of becoming one of the most famous Americans of her era, Anthony’s legacy has overshadowed many of her contemporaries who were also active in the fight for civil rights. Among them, few led as interesting or progressive a life as Dr. Mary Edwards Walker, who grew up in a family that encouraged every kind of pursuit for girls and provided an educational foundation that would propel Walker in many fields.

Of the many campaigns during the Middle Ages, few are as remarkable or seemingly impossible to win at the start as the First Crusade (1095-99), and the true crowning achievement of that crusade, which resulted in two centuries of Western European Christian states in the Middle East and the permanent firing of the European imagination, was the conquest of Jerusalem on July 15, 1099 after three weeks of siege.

It all began on Memorial Day, May 31, 1921. Around or after 4:00 p.m. that day, a clerk at Renberg’s clothing store on the first floor of the Drexel Building in Tulsa heard a woman scream. Turning in the direction of the scream, he saw a young black man running from the building. Going to the elevator, the clerk found the white elevator operator, 17-year-old Sarah Page, crying and distraught. The clerk concluded that she had been assaulted by the black man he saw running a few moments earlier and called the police.

Germany's North African defeat opened up the possibility of taking the war in the West to the European continent for the first time since France's lightning conquest by the Wehrmacht in 1940. The British and Americans debated the merits of landing in France directly in 1943, but they ultimately opted against it. The Soviets railed at the Westerners as “bastards of allies”; but a 1943 “D-Day”-style landing in France might have proven a strategic and logistical impossibility.

The early first millennium BCE was a time of great change and turmoil in the Near East and Eastern Europe. Many of the Bronze Age empires had collapsed, but in their place came new ones in Assyria, Persia, and Babylon, as well as a rejuvenated Egypt. Other peoples also began to enter the historical record and assert themselves. In the wake of the Sea Peoples destruction in Anatolia, the Lydians and Phrygians established powerful kingdoms, and by the 8th century BCE the Greek city-states had formed and the Greeks began establishing colonies along the western coast of Anatolia.

In October 1962, American spy planes discovered the Soviets were building nuclear missile sites in Cuba, and intelligence officials informed President John F. Kennedy of this on October 16th. It went without saying that nuclear missile sites located just miles off the coast of the American mainland posed a grave threat to the country, especially because missiles launched from Cuba would reach their targets in mere minutes. That would throw off important military balances in nuclear arms and locations that had previously ensured the Cold War stayed cold.

The Pleistocene spans a period from around 2.5 million years ago (mya) to just over 12,000 years ago, and it was an epoch of enormous change on Earth, mainly characterized by climate changes involving fluctuations between periods of extreme heat and long periods of glaciation. This period is commonly known as the Ice Age, despite the fact there were actually a number of separate periods of cold. The Pleistocene Era: The History of the Ice Age and the Dawn of Modern Humans looks at the development of the era, what life on Earth was like, and the origins of archaic humans.

The Civil War was the deadliest conflict in American history, and had the two sides realized it would last four years and inflict over a million casualties, it might not have been fought. Since it was, however, historians and history buffs alike have been studying and analyzing the biggest battles ever since. Americans have long been fascinated by the Civil War, marveling at the size of the battles, the leadership of the generals, and the courage of the soldiers.

As a basic definition, it may be said that an Ice Age is simply a period of time during which thick ice sheets cover vast areas of land. These sheets have advanced and retreated, at times taking over the entire planet, and conversely disappearing nearly altogether. Glacial ice formed by this regularly occurring process does not sit in a state of inertia, but moves dynamically, reshaping the geological features of the continents.

The Cristero War in Mexico is the last great armed movement in a country that for a hundred years suffered revolution after revolution, in an apparently endless cycle. Ignored for decades, the war was long seen simply as an unwanted corollary of the Mexican Revolution, a kind of anomaly in the official narrative.

On Wednesday, March 28, 1979, 36 seconds after the hour of 4:00 a.m., several water pumps stopped working in the unit 2 nuclear power plant on Three Mile Island, 10 miles southeast of Harrisburg, Pennsylvania

It was Constantine the Great who first decided that Rome, exposed and vulnerable near the gathering masses of barbarians moving into Germania and Gaul in the early 4th century, was a strategically unsafe base for the empire, and thus expanded the city of New Rome on the Dardanelles straits, creating what eventually became Constantinople.

In ancient Greece, “no other practice was so universal than the consultation of oracles.” These holy sites were found in 260 locations around the Greek-speaking world.