This is from the Standard Course Book of HSK5, chapter 15.
What is the meaning of 正好? Wiktionary says that it means "by chance". Something like coincidentally.
这一年(this year)正好(by chance / coincidentally)秦国(Qin Guo)军队(army)来(arrived)打(to attack)赵国(Zhao Guo)
It really happened accidentally? Or what else 正好 means?