On September 22nd, 1862, already almost two years into the US Civil War, President Abraham Lincoln issued the Emancipation Proclamation stating that, as of January 1st, 1863, all slaves within any State would be "thenceforward, and forever free." This proclamation freed 3.5 million men and women of African-American descent and, included in the proclamation, was the sentence that "the executive government of the United States, including the military and naval authority thereof, will recognize and maintain the freedom of such persons and will do no act or acts to repress such persons, or any of them, in any efforts they may make for their actual freedom." This meant that African-Americans could serve in the armed forces of the Union. Dur: 20mins File: .mp3

In the Spring of 334 BC, the 22-year-old Macedonian king, Alexander III (r. 336-323 BC - not yet ‘the Great’), invaded the vast Achaemenid Persian Empire with an elite but small army of some 30-40,000 veteran infantry and only 5,000 cavalry. This invasion was the culmination of almost a century of pressure for some Greek commander or other to punish Persia for its own invasion of Greece during the fifth century BC. Persia had also continued to seriously meddle in Greek affairs thereafter, affecting the end of the Peloponnesian War in 404 BC and with the King’s Peace in 386 BC. Dur: 31mins File: .mp3

Twelve years have passed since the disastrous Crusader Battle of Varna and three years since the fall of Constantinople to the Ottoman Empire in 1453. Europe is reeling under the relentless pressure of Ottoman advances: Serbia fell in 1455, and Sultan Mehmed II had now amassed his forces for an invasion of the Kingdom of Hungary. To launch this invasion, he first needs the fortress town of Belgrade... Dur: 20mins File: .mp3