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Towards the end of the Lê Dynasty, civil strife engulfed much of Vietnam. First, the Chinese-supported Mạc Dynasty challenged the Lê Dynasty's power. After the Mạc Dynasty was defeated, the Lê Dynasty was reinstalled, but with no actual power. Power was divided between the Trịnh Lords in the North and the Nguyễn Lords in the South, who engaged in a civil war for more than a hundred years. The civil war ended when the Tây Sơn brothers defeated both and established their new dynasty. However, their rule did not last long and they were defeated by the remnants of the Nguyễn Lords with the help of the French, who established the Nguyễn Dynasty.

French colonialism

Vietnam's independence ended in the mid-1800s, when the country was colonized by the French. The French administration imposed significant political and cultural changes on Vietnamese society. A Western-style system of modern education was developed, and Christianity was introduced into Vietnamese society. Developing a plantation economy to promote the exports of tobacco, indigo, tea and coffee, the French largely ignored increasing calls for self-government and civil rights. A nationalist political movement soon emerged, with leaders such as Phan Boi Chau, Phan Chu Trinh, Emperor Ham Nghi and Ho Chi Minh calling for independence. However, the French maintained dominant control of their colonies until World War II, when the Japanese war in the Pacific triggered the invasion of Indochina. The natural resources of Vietnam were exploited for the purposes of Japan's military campaigns into Burma, the Malay Peninsula and India.

In the final years of the war, a forceful nationalist insurgency emerged under Ho Chi Minh, committed to independence and communism. Following the defeat of Japan, nationalist forces fought French colonial forces in the First Indochina War that lasted from 1945 to 1954. The French suffered a major defeat at the Battle of Dien Bien Phu and shortly afterwards withdrew from the country. The countries that fought the Vietnam War divided the country at the 17th parallel into North Vietnam and South Vietnam during the Geneva Accords.

Vietnam war

The communist-held North Vietnam was opposed by the United States which had sided with the French colonists in the Battle of Dien Bien Phu. Disagreements soon emerged over the organizing of elections and reunification, and the U.S. began increasing its contribution of military advisers. The disputed Gulf of Tonkin Incident was the immediate reason the U.S. cited for its military assault on North Vietnamese military installations and the gradual deployment of more than 500,000 troops into South Vietnam. U.S. forces were soon embroiled in a guerrilla war with the Viet Cong, the insurgents who were indigenous to South Vietnam. North Vietnamese forces unsuccessfully attempted to overrun the South during the 1968 Tet Offensive and the war soon spread into neighboring Laos and Cambodia, both of which the United States bombed.

The extent of the U.S. bombing of Cambodia has become known only recently. "In 1975, Pol Pot's genocidal Khmer Rouge forces took power in Cambodia after a massive U.S. bombing campaign there. New information reveals that Cambodia was bombed far more heavily during the Vietnam War than previously believed — and that the bombing began not under Richard Nixon, but under Lyndon Johnson." Maps and a database of bombing by the U.S. Air Force of Laos, Cambodia and Vietnam was created from data the United States provided in an effort to help locate unexploded ordnance left behind during the U.S. carpet bombing of the region.[1]

Questions & Answers

Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
While the American heart association suggests that meditation might be used in conjunction with more traditional treatments as a way to manage hypertension
Beverly Reply
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Source:  OpenStax, Central eurasian tag. OpenStax CNX. Feb 08, 2009 Download for free at http://cnx.org/content/col10641/1.1
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