The earliest evidence of the presence of human ancestors in the southern Balkans, dated to 270,000 BC, is to be found in the Petralona cave, in the Greek province of Macedonia. All three stages of the stone age (Paleolithic, Mesolithic, and Neolithic) are represented in Greece, for example in the Franchthi Cave. Neolithic settlements in Greece, dating from the 7th millennium BC, are the oldest in Europe by several centuries, as Greece lies on the route via which farming spread from the Near East to Europe.
Humans in the Balkans have been dated to what year?
270,000 BC

The United States originally wished to remain neutral when World War I broke out in August 1914. However, it insisted on its right as a neutral party to immunity from German submarine attack, even though its ships carried food and raw materials to Britain. In 1917 the Germans resumed submarine attacks, knowing that it would lead to American entry. When the U.S declared war, the U.S. army was still small by European standards and mobilization would take a year. Meanwhile, the U.S. continued to provide supplies and money to Britain and France, and initiated the first peacetime draft. Industrial mobilization took longer than expected, so divisions were sent to Europe without equipment, relying instead on the British and French to supply them.
What year did the US enter World War I?
1917

The Romans under Nero Claudius Drusus established a military outpost belonging to the Germania Superior Roman province at Strasbourg's current location, and named it Argentoratum. (Hence the town is commonly called Argentina in medieval Latin.) The name "Argentoratum" was first mentioned in 12 BC and the city celebrated its 2,000th birthday in 1988. "Argentorate" as the toponym of the Gaulish settlement preceded it before being Latinized, but it is not known by how long. The Roman camp was destroyed by fire and rebuilt six times between the first and the fifth centuries AD: in 70, 97, 235, 355, in the last quarter of the fourth century, and in the early years of the fifth century. It was under Trajan and after the fire of 97 that Argentoratum received its most extended and fortified shape. From the year 90 on, the Legio VIII Augusta was permanently stationed in the Roman camp of Argentoratum. It then included a cavalry section and covered an area of approximately 20 hectares. Other Roman legions temporarily stationed in Argentoratum were the Legio XIV Gemina and the Legio XXI Rapax, the latter during the reign of Nero.
After what year was the Legio VIII Augusta permanently stationed in Argentoratum?
year 90