The ultimatum to Serbia?

23rd July 1914

After the assassination of the Archduke Franz Ferdinand, heir to the throne of Austia-Hungary on June 28, 1914, the Austrian government waited for over three weeks before it became clear what action...

Austria sent the ultimatum to Serbia on July 23rd 1914

the assassination of Archduke Francis Ferdinand.

I am guessing that this question is referring to the Ultimatum given by the Austria-Hungarian government to Serbia just before WW1. The whole point of the conflict between Serbia and Austria at the...