The Mongol people were plagued by internecine conflict until Genghis Khan unified them and focused their aggression outwards on other peoples.
Of or relating to struggle within a nation, organization, or group.
Origin of internecine
Latin internecīnusdestructivevariant ofinternecīvusfrominternecāreto slaughterinter-intensive pref.inter–nexnec-deathnek-1 in Indo-European roots
American Heritage Dictionary of the English Language, 5th Edition
From Latininternecīvus, deadly, alternatively, Latin inter (between) and necare (to slay).
Internecine Sentence Examples
The partition did not, however, prevent internecine wars.
At the end of the year the Greeks were once more free to renew their internecine feuds.
It was the only battle which I have ever witnessed, the only battle-field I ever trod while the battle was raging; internecine war; the red republicans on the one hand, and the black imperialists on the other.
The disorganization and internecine feuds of the various states prepared the way for the Ottoman invasion.
There was more or less internecine conflict throughout the war, and local disaffection under Union rule; and Confederate recruiting was carried on even north of the Missouri.