My father used to tell me that during Resistence-Against-Jap War everybody would sing the song, even including Chiang Kai-Shek. My father also said the power of the song could equate itself with five well-trained divisions of army on battle fields.
Attached below is a reportage on how had the song become the national anthem of China after 1949
PS I did translate the song in my previous writing at http://blog.udn.com/kkuo0810/124360998. It is the national anthem to me!