《明史·列传·卷二百一十五》
此后，敌人每年仍进犯边关，但都不敢太深入。
是后岁犯边，然不敢大入。
After that, the enemy still invaded the border every year, but they did not dare to go too deep.
<s>[INST] Kindly elucidate the central themes in this passage in English: 是后岁犯边，然不敢大入。 [/INST] After that, the enemy still invaded the border every year, but they did not dare to go too deep.</s>
Kindly elucidate the central themes in this passage in English: 是后岁犯边，然不敢大入。
user
After that, the enemy still invaded the border every year, but they did not dare to go too deep.
assistant