せしむる

Hi, i need a little help with an unknown word/verb.
A title from a 1906 newspaper: A fierce contest is going to begin.
And then:

陥落せしむるは   Aか Bか

I think a rough translation is: Who is going to fall? A? B?
But, what is exactly せしむる? Some old form of する? How can I translate correctly?
Thanks for your help.