The Libyan-Egyptian War
This 1977 war was a short border conflict that was spurred by a myriad of factors, including personal dislike for Muammar al-Gaddafi by Egyptian leader Anwar Sadat.
The feeling was actually mutual, with Gaddafi sponsoring assassination attempts targeting Sadat. But both men also disagreed on the sort of relationship that should exist between Arab states and Israel.
When Sadat decided to make peace with Israel in the aftermath of the Yom Kippur War, Gaddafi rehashed a rather benign border dispute with Egypt. The violence lasted four days.