Published on, well, 1st May, 1936. Translations were written and sent out in advance so it could be read in other countries on the same day.

Workingmen and Workingwomen of all nations! Today is Labor Day! Let us commemorate all the workers who have been slain in the pursuit of justice. Even now, they still massacre us when we cry out for our rights. Look at what they are doing in Germany. Look at what they are doing in Entente nations. Monarchs rule us, Capitalists crush us, and Reactionaries divide us against ourselves.

Workingmen and Workingwomen of all nations, you must Unionize! You must unite against Capital, Reaction, and Monarchy! You are millions and they are few. Only through unity and action have we wrung change from the ruling classes. The Monarchs want to stop you. The Capitalist wants to steal from you. The Reactionary wants to take every little luxury you have back from you in order to gain themselves more power and repress whoever they want you to be angry at instead.

You must Unionize. You must unite. You must all take action as one group. Either you are united and strong or you are divided and destroyed.