《明史·列传·卷六十一》
六月，也先又率二千骑兵人侵，郭登再次击退之。
六月，也先复以二千骑入寇，登再击却之。
In June, Yesian led 2,000 cavalries to attack again, and Guo Deng repelled them once more.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 六月，也先复以二千骑入寇，登再击却之。 [/INST] In June, Yesian led 2,000 cavalries to attack again, and Guo Deng repelled them once more.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 六月，也先复以二千骑入寇，登再击却之。
user
In June, Yesian led 2,000 cavalries to attack again, and Guo Deng repelled them once more.
assistant