The Rouran may have fled west after that and become part of the Pannonian Avars. The Göktürks chased after these "Avars" into the Byzantine Empire.
The Rouran were nomads. They lived in the eastern Eurasian Steppe (Mongolia and northeast China). They overthrew the Xianbei. Most Xianbei moved south and lived in Northern China. Kwok Kin Poon argues the Rouran descended from the Donghu Xianbei.
The founder of the Rouran Khaganate was Yujiulu Shelun. He descended from slaves of the Xianbei. The Xianbei used the word rouran to mean "wriggling worms".
After the Xianbei moved south in the 3rd century, the Rouran took over and conquered a lot of land.
In 402 Shelun unified all of the Rouran. They defeated the neighboring Tiele and expanded to the Silk Roads. They then conquered and vassalized the Hephthalites (of Central Asia) until 5th century.
The Hepthalites then moved towards India and replaced the Yuezhi in Bactria. The Hephtalites borrowed much culture and language from the Rouran: including the word "Khan".
In 429, Northern Wei (where the Xianbei settled) attacked the Rouran and killed many.
In 434, the Rouran made a heqin with Northern Wei.
Between 440-460, the Northern Wei attacked and defeated the Rouran several times.
The Rouran made a heqin with the Han-Chinese ruler Gao Huan of Eastern Wei.
In 508, the Tiele defeated the Rouran.
In 516, the Rouran defeated the Tiele.
In 551, Bumin of the Ashina Göktürks () defeated the Tiele revolt for the Rouran. In return Bumin asked for a Rouran princess (heqin). Rouran refused, so Bumin declared independence.
Bumin made a heqin with the Western Wei (descend from Northern Wei). Bumin then attacked the Rouran in 552, killing Yujiulü Anagui. Bumin then conquered Otuken.
He declared himself Illig Khagan and started the Turkic Khaganate. He died soon Bumin but his son Issik Qaghan succeeded him. Issik continued attacking the Rouran but died a year later in 553. His brother Muqan Qaghan finished the job and annihilated the Rouran in 555.
Eurasian Steppe
The Eurasian Steppe (or Ya'ou Steppe; 亚欧草原) is a steppe ecoregion (a huge stretch of grasslands) in north Eurasia. It stretches from Eastern Europe, Russia, Kazakhstan, to Mongolia and north China. It is south of Siberia.
For most of history, nomads lived and wandered there on horseback. The horse may have came from the steppe, around Kazakhstan. With the horses the steppe was a highway that moved people from China to Europe. For this reason it became important for the Silk Road.
The steppe has been ruled by many empires. Examples are the Altaic people, Chinese, Slavic people, and Central Asians: including the Xiongnu, Scythians, Han dynasty, Xianbei, Sogdians, Turkic Khaganate, Khazars, Tang Dynasty, Mongol Empire, Russian Empire, and Qing dynasty.
Otuken
Ötüken was the capital of the Turkic Khaganate. Otugan was around Mongolia and Central Asia on the Khangan Plateau. Ötüken probably stretched "from the Khangai Range of Central Mongolia to the Sayan Mountains of Tuva [Siberia], at the centre of which is the Orkhon Valley". which for centuries was regarded as the seat of the imperial power of the steppes.
It was also an important place in Turkic mythology and Tengrism. Otukan means Mother Earth.
Chu River
The Chu (or Shu, from Chinese: "chǔ") is a river in northern Kyrgyzstan and southern Kazakhstan. It is 1067 km long and is one of the longest rivers in Central Asia, a landlocked region. They are the homeplace of the Dungan people, who moved there during the Qing dynasty.
Lake Balqash
Lake Balkhash () is located in Kazakhstan. It is one of the largest lakes in Asia and 15th largest in the world.
It belongs to a Central Asian endorheic basin shared by Kazakhstan, China, and Kyrgyzstan. Water moves from the basin to Balqash via seven rivers. The most important one is the Ili River. Water in the Ili River comes from melted snow from the mountains of China's Xinjiang.
North–South Corridor, Singapore
The North–South Corridor (NSC), at first known as the North-South Expressway, will be the 11th expressway of Singapore. It will serve extra traffic along the north-south corridor that is currently being served by the Central Expressway (CTE). It was announced on 30 January 2008. It was announced during a major review of Singapore's transport network by the Land Transport Authority (LTA). The expressway would cost about S$7–8 billion when to build. It is planned to be finished being built in 2026. It will connect the East Coast Parkway (ECP) with the northern parts of Singapore.
The NSC will have 16 entrances and 17 exits to connect towns along the north-south corridor. They are Woodlands, Sembawang, Yishun, Ang Mo Kio, Bishan and Toa Payoh. It will connect them with the city centre. The NSC will also connect with already-built expressways, like the Seletar Expressway (SLE), Pan-Island Expressway (PIE) and East Coast Parkway (ECP).
According to the Land Transport Authority, the bus lanes along the NSC will reduce bus travelling times from Woodlands, Sembawang, Yishun and Ang Mo Kio to the city by up to 30 minutes. It is done through morning and evening peak express bus services. It can speed up bus routes between towns along the NSC faster by allowing buses to use the ramps and bus lanes in it. A cycling path along the entire length of the highway will link up Park Connector Networks and cycling path networks within HDB towns along the entire road to the city centre.
At first, it was supposed to be built by 2023. Because of construction delays, it now can only be built by 2026.
On 19 January 2011, the government allowed the expressway to be built. It was to be built between the roads Admiralty Road West and Toa Payoh Rise. On 15 November 2011, the Land Transport Authority (LTA) revealed the whole route of the North-South Corridor.
It was first planned to be an expressway for vehicles to be built by 2020. However, the corridor will now be built as Singapore's first "integrated transport corridor". It will have bus routes and cycling path along the entire expressway. Its construction was supposed to start in 2017, and it was supposed to be finally built by 2023. However, the first contract was only given in November 2017, with construction work starting in early 2018.
Now, it is planned to be finished by 2026.
The NSC will stat at Admiralty Road West in the North of Singapore. It would go south and pass by Woodlands and Sembawang. It would have a junction with the Seletar Expressway. It would then go through Toa Payoh. It would run parallel with the Central Expressway, and then join the East Coast Parkway in the city.
The LTA tried to use as much state land as possible. This makes sure that as few private properties are take as possible. Even though the expressway is underground in its Southern part, some land had to be taken. This is because there are MRT tunnels blocking its way. The Rochor Centre had to be demolished because of this. Some underpasses at Novena Square had to be demolished. The Ellison Building may also have to be demolished.
Expressways of Singapore
The expressways of Singapore are:
Pentium 4
Pentium 4 is a seventh generation single core Microprocessor of x86 architecture (32-bit), manufactured by Intel. Its first complete redesign CPU (called NetBurst) since the processor Pentium Pro, released in 1995. Compared to the Pentium II, Pentium III and Celeron processors, its architecture is little similar to the Pentium Pro/P6 processor design. The NetBurst microarchitecture contains a very deep instruction pipeline to be able to achieve very high frequencies. The Pentium 4 was known for being inefficient and producing a large amount of heat. Because of this, Intel introduced the Core 2 in 2006. Intel stopped making the Pentium 4 in 2008.
Lee-Enfield
The Lee-Enfield is a series of bolt-action rifles that was used by the British Armed Forces. It was the main British rifle for the first half of the 20th century, and was used until the end of the century.