He is using the English translation of the German word frohlich from Nietzsche's The Gay Science.

他用的其实是德语“快乐的“一词的英文翻译,而那个词则来自尼采写的“快乐的科学家“这个标题。

耶鲁公开课 - 文学理论导论课程节选

And so, what happens is that he goes to war in the summer of 1870, without any allies, against Prussia and its South German allies, and he thinks he's going to win.

因此,战争在一八七零年夏天爆发,法军孤立无援,单独对抗普鲁士及其南德诸邦盟友,他自认为必胜无疑

耶鲁公开课 - 1871年后的法国课程节选