World War I, or the Great War, was believed to be "the war to end all wars". Because of the incredible extent of destruction and the staggering number of wounded and dead, even those who lived through it could scarcely comprehend its horror. Beginning in 1914, alliances between powerful nations soon plunged the world into a global conflict. Fighting - including miserable trench warfare - broke out in practically every corner of Europe and spread around the world to Africa, Asia, and the Middle East.

For 28 years, the Berlin Wall was a symbol of communist oppression and tyranny. The barricade was built in August 1961 to keep East German citizens from defecting to West Germany. This is the story of an oppressive symbol — a wall erected to form a prison for those within its border — but it is also the story of triumph over tyranny when finally, 28 years after it was first built, the Berlin Wall came tumbling down in 1989.

Auschwitz is a monument to the barbaric inhumanity of the Nazi regime. It is the site where more than one million people were systematically tortured and killed in support of Adolf Hitler’s determination to eradicate entire populations that he viewed as racially impure.

Bernard Montgomery, “the Spartan General”, was one of the giants of World War II. He was a field marshal, as well as an entirely powerful personality, who shaped much of how that aforementioned cataclysmic conflict turned out. If it weren’t for Montgomery’s steady hand in North Africa, for example, it would have been much harder for the Allies to prevail. Montgomery was born the humble son of a minister. As he matured, he grew increasingly bold and confident in his own abilities. He realized he was a natural leader of men—and others quickly came to realize it as well.

The Chernobyl Disaster, which occurred in late April 1986, was the worst nuclear accident in history. It not only caused widespread radioactive contamination, but even more importantly, it claimed many lives and caused panic worldwide about the safety of nuclear power. In short, it changed the face of nuclear energy globally.

Robert Oppenheimer had a lot resting on his shoulders. During the Second World War, he was tasked with directing the development of the world’s first nuclear arsenal. Known as the Manhattan Project, this super-secretive wartime project had the stoic visage of Oppenheimer overseeing the greatest experiment ever conducted by humankind. Much had happened in Oppenheimer’s life to lead him to this point, and much would subsequently take place after, but this moment was indeed the pinnacle of his career and his life.

Alan Turing had a radical and ingenious mind. He is considered one of the fathers of artificial intelligence, and his theories on this matter range from purely mechanical to almost spiritual. During World War II, his decryption of the Nazis’ Enigma codes proved vital for the Allied victory over the Axis powers. Turing’s fingerprints are everywhere, and yet his own country for quite some time failed to acknowledge it.

Audie Murphy was a movie star, writer, and one of the most decorated soldiers who ever lived. He was barely 18 years old when he was shipped off to fight Fascists in Italy during World War II. As he himself would later liken it, he went “to hell and back” and lived to tell the tale. In this book, we will dive deeper to bring you the man behind the medals. Here is a telling of the life and legend of Audie Murphy in full.

D-Day, June 6, is one of the most significant dates in the calendar. The 20th century's fate hung in the balance as Nazi Germany had marched across Europe, bringing the blitzkrieg, the Holocaust, and the mad dreams of Adolf Hitler across the bloodied landscape of Europe. In order for the Nazis to be stopped, the Allies had to invade occupied Europe. And invade they did, launching the most massive amphibious landing the world had ever seen.

The Korean War, which began in 1950 and ended in 1953, is not considered one of the major wars of the 20th century. However, in reality, it was profoundly impactful on global history. As an early crisis of the Cold War, it set important precedents for how conflicts would be handled during this era. It has also shaped Korea’s history for more than half a century.

The first female Doctor of the Church, Teresa of Ávila, was a visionary who took matters of reform into her own hands. Even when the church authorities came against her, she stood her ground and held fast to her convictions. In so doing, she managed to persuade the Catholic powers to come around to her point of view. Teresa was not someone who took “no” for an answer; she charted her own course in life.

The Great Depression was one of the most trying eras in American history. All aspects of the US were affected. After the stock market crash of 1929, the nation was thrust into a decade of turmoil and change - in government, the economy, and culture. Many of the changes brought about by the Great Depression remain today.

Martin Luther is famous for the moment he nailed his 95 Theses to the church door in Wittenberg, yet the scope of his influence on the modern world is hardly limited to that one act. He emerged as a leader of the Reformation, coming onto the European scene at a time when modes of thought were changing, adapting from the medieval norm of reliance on authoritative sources such as Aristotle to modern ideas of discovering knowledge through textual interpretation, experience, and experimentation.

George Washington, the first president of the United States, is much more than a monument on Mount Rushmore. Who was Washington, the general, president, and husband? He was first and foremost a man of impeccable honor which, despite military adversity and political wrangling, never abandoned him. The Founding Fathers who squabbled and competed among themselves did agree on one thing: Only Washington could lead the country, first in the country’s military fight for freedom and then as the man charged with transforming 13 individual states into a united country.

Nikola Tesla was a major figure in the world in which he lived. As the 19th century gave way to the 20th, it was Tesla who would contribute to some of the world's most amazing inventions. It was Tesla's theories, patents, and experiments that would pave the way for the digital, wireless world we are so familiar with today. Tesla didn't enjoy the high honors bestowed on so many of his contemporaries, yet he enjoyed the power of knowing that it was his inventions that were powering the world, literally.