The forced abdication of Emperor Puyi and subsequent fall of the Qing dynasty in 1912 resulted in the rise of the Republic of China, and with it the emergence of Sun Yat-Sen’s government. This symbolized the shift away from the centuries old dynastic cycle and entrance into the 20^th century. The Song Dynasty lasted from 960-1279 CE. The Yuan dynasty lasted from 1271-1368. The Tang dynasty preceded the Song dynasty, existing from 618-904. The Ming dynasty lasted from 1368-1644.

The battle of Dien Bien Phu was fought between the French and Vietnamese during France's attempt to re-assert colonial control over Vietnam following World War II.  The Vietnamese victory resulted in the end of further French attempts at re-conquest.

When the British and French governments decolonized the Arab world, they left behind countries designed to be dependent upon Britain and France.

They did not want Arab independence, so they ensured no country would be powerful.

The modern problems in the Arab world all stem from this original systemic weakness, which is the cause of most other geopolitical problems in the modern Middle East.

The British and French did consult with certain local leaders, but made sure to hamper these leaders with linguistically and geographically disparate populations against the wishes of both the leaders and the populations.

The British and French colonial administrations were scared of the prospect of hundreds of millions of Arabic speakers coalescing into a single country, so they ensured that when they decolonized the region they left behind nothing formidable or powerful.

While France had a very large portion of Africa as colonies, their colonies were largely made up of the Sahara Desert, and had little in the way of resources. Britain's colonies, however, were the envy of the continent. They had all the great societies of the continent and access to all the best resources Africa had to offer. Add this to the shear volume of the colonies Britain received in the Scramble for Africa, and Britain was easily the dominant power.

Major ports had existed along the coastline of Africa since well before European colonization. Similarly, in the interior of Africa, where Europeans had never gone before, the primary form of transportation over long distances were animals. 

Europeans described the European way of doing things to Africans as the Western Way. The idea was that Europe was the Western world and it was the superior region of the world. Therefore the people of Africa should adopt this Western way of doing things.

The Italians never attempted to colonize Vietnam.

Many Vietnamese fought against American influence in South Vietnam because they saw it as an obstacle to Vietnamese independence.

Many Vietnamese fought against French colonial efforts in Vietnam because they wanted an independence.

Chinese encroachment caused many Vietnamese to take up arms for the cause of independence.

During WWII, many Vietnamese fought against Japanese imperialism including Ho Chi Minh.

The Japanese used Pu-Yi as a puppet leader of their northern Chinese vassal state, Manchukuo.

The Japanese did not attempt to make Pu-Yi the leader of Taiwan, Vietnam, Cambodia, or Burma as a Chinese sovereign would not have been welcomed in any of these places.

By 1914 only Ethiopia and Liberia remained independent from European rule. This was due to the military prowess of the Ethiopians, and the American protection afforded to Liberia. The rest of the continent had been taken over by the Europeans by 1914.

The Ethiopian military successfully defended Ethiopia from several attempted European invasions. The problem for the Europeans was the difficult mountainous terrain gave the Ethiopians the advantage in battle, one which they exploited very well and which attacking Europeans did not understand or plan for.