Simplify the following text for a Grade 8 native English-speaking person.
Original: Because the lowlands did not have enough open grasslands to support a large horsebound force the nomads who conquered states in China , India , and the Middle East were soon forced to adapt to the local societies .
Simplified: However , the lowlands did not have enough open grasslands to support a large horsebound force . Thus the nomads who conquered states in China , India , and the Middle East were soon forced to adapt to the local societies .