The top flying ace of World War I was manfred von Richthofen hailed from Germany.
Answer:
Indus river (India): Harappa And the city of Mohenjo-daro
Nile river (Egypt): Ancient egyptian pryramid structures, obelisks, System of mathmatics, Medicine development, etc.
Huang he (China): The great wall of china build, development of budda religion, growing rice products.
Tigris-Euphrates (Mesopotamia): The wheel, plow tool, and cut canals and river connections.
Serfs, likewise might be farmers but might also be craftsmen. The difference between the two was that the peasant owned his own land, while the serf did not. The serf owed labor duties to his lord, whereas a peasant owed nothing or, more usually, owed some sort of rent.
In the Balkans, Serbia had won autonomy in 1817, and southern Greece won independence in the 1830s. But many Serbs and Greeks still lived in the Balkans under Ottoman rule. The Ottoman empire was home to other national groups, such as Bulgarians and Romanians. During the 1800s, various subject peoples staged revolts against the Ottomans, hoping to set up their own independent states.
Such nationalist stirrings became mixed up with the ambitions of the great European powers. In the mid-1800s, Europeans came to see the Ottoman empire as "the sick man of Europe." Eagerly, they scrambled to divide up Ottoman lands. Russia pushed south toward the Black Sea and Istanbul, which Russians still called Constantinople. Austria-Hungary took control of the provinces of Bosnia and Herzegovina. This action angered the Serbs, who also had hoped to expand into that area. Meanwhile, Britain and France set their sights on other Ottoman lands in the Middle East and North Africa.