Answer:
Blank check
Explanation:
Kaiser Wilhelm II pledge related as the blank check assurance. He promised to assist the events leading up to the First World War during 1914. He swears his complete support for whatever response Austria-Hungary wishes to take in its conflict with Serbia.
European countries began to form alliances with other countries after the assassination of Austria-Hungary Archduke Franz Ferdinand. The outrage in Europe turns nations to form alliance, which later formed two groups; the Allies and Central Powers.
