Why was commodus assassinated?

Commodus was murdered on New Year's Eve of 192. Because he had not chosen a successor, civil war broke out and in five months four emperors were to rule Rome. Commodus was followed by the virtuous Pertinax, who ran an honest government, reduced spending, lowered taxes and even found homes for Commodus' 600 concubines.

During his Gettysbury Adress of President Lincoln of the United States, he used union term to replace the word nation. His address was about his salute to the soldiers who gave their last full measure of devotion and commitment or lives for the Union so as to serve their purpose.