Long ago, a great land grew. 

Long ago, a great land grew. 
The land was called Kambuja. It had many big cities. 
One king built a famous place called Angkor Wat. 
Later, the weather changed. There was too much rain. Then there was a long dry time. This hurt their water ways.
Many people moved away from the big cities. The empire began to end. It was a very special time in history.
The Khmer Empire was a powerful land in Southeast Asia. 
As time passed, the empire grew very large. It reached as far north as southern China. The kings built many grand stone temples. One famous king, Suryavarman II, built Angkor Wat. 

Later, the empire began to change. The weather became hard to live with. There were very heavy rains. Then, there were long times with no rain. This dry weather hurt their water systems. Because of this, many people moved away. The empire slowly came to an end.
The Khmer Empire was a mighty land in Southeast Asia. 

Life in the empire relied on a smart way to use water. 

The empire began with a prince named Jayavarman II. Around 781, he made Indrapura his first capital. In 802 AD, he held a grand ritual on Mount Mahendraparvata. This mountain is now known as Phnom Kulen. At this ceremony, he named himself a "universal ruler." 

Many famous kings built great things during the empire's life. Yasovarman I built the city of Yasodharapura. He also made the East Baray, a huge water reservoir. 


The empire eventually began to fade away. Scholars still debate why this happened. One reason might be the changing weather. The region had very strong monsoon rains for a time. 

The Khmer Empire was a powerful civilization in mainland Southeast Asia. 

The empire functioned through a sophisticated water management network. This system included canals and massive reservoirs called barays. During its peak from the 11th to the 13th centuries, this network was the most extensive pre-industrial urban complex in the world. 
The history of the empire began with Prince Jayavarman II. Around 781 AD, he established Indrapura as his first capital. In 802 AD, he performed a grand ritual on Mount Mahendraparvata, now known as Phnom Kulen. 
Successive kings expanded the territory and built new capitals. Indravarman I, who reigned from 877 to 889, expanded the kingdom through trade and agriculture. He built the temple of Preah Ko and improved irrigation works. 
The 12th century marked a period of both intense conflict and great achievement. King Suryavarman II ruled from 1113 to 1150. He is best known for building the magnificent temple of Angkor Wat. This temple was dedicated to the Hindu god Vishnu. It took 37 years of construction to complete this massive monument. 
At its height in the 13th century, the empire was incredibly populous. The Greater Angkor Region held between 700,000 and 900,000 people. 
The decline of the Khmer Empire remains a subject of scholarly debate. One major factor was the instability of the climate. The region experienced a period of very heavy monsoon rains. 
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