The three events that contributed to the Six-Day War were:
1. Border conflicts between Israel, Syria, and Jordan: There were ongoing tensions and skirmishes between Israel and its Arab neighbors, particularly along their shared borders.
2. Militarization of Arab nations and Israel supported by the Soviet Union and the United States: Both sides were receiving military support and weapons from their respective superpower allies, which contributed to a buildup of arms and a sense of military readiness.
3. Soviet Union reports of a planned Israeli invasion of Syria: In May 1967, the Soviet Union falsely reported to Egypt and Syria that Israel was planning to invade Syria. This led to an increase in military tensions and preparedness, with Israel launching a preemptive strike against Egypt on June 5, 1967, which quickly drew in other Arab nations and led to the Six-Day War.