Answer: to regain territory that had been lost
Step-by-step explanation:
The Yom Kippur War started between Egypt and Syria in 1973, on the Jewish day of Yom Kippur and during the Islamic month of Ramadan.
After the Six-Day War (1967) tensions arose into a full-scale war by 1973, in an attempt to lead Israel to negotiate on terms more beneficial to the Arab nations. Syrians and Egyptians, supplied by Moscow, sought to recover territory that had been lost in the previous conflict. Eventually, both the United States and the Soviet Union were drawn into an indirect conflict in support of their respective allies.