Final answer:
Austria-Hungary accused Serbia of harboring the terrorist organization responsible for the assassination of Archduke Franz Ferdinand. They demanded Serbian subservience and attempted to conduct a full-scale investigation, but Serbia declined. These accusations played a significant role in the events leading up to World War I.
Step-by-step explanation:
Austria-Hungary made several accusations against Serbia. They demanded Serbian subservience for harboring the terrorist organization responsible for the assassination of Archduke Franz Ferdinand. Austria-Hungary demanded that Serbia allow Austrian agents to conduct a full-scale investigation of the assassination, which Serbia refused due to their honor. The accusations ultimately led to the tension between Austria-Hungary and Serbia, which contributed to the outbreak of World War I.