I recall there were more than two. Need help here.
1948: War of Independence
1956: Egypt's Nasser starts a war but the Israelis kick his a--. Israeli army threatens Cairo and occupies the Sinai, but British and French threats get them to retreat.
1967: Arabs on all sides threaten war but the Israelis strike first and destroy the Arab Air Forces. Then, they whomp a-- in tank battles. Arabs flee in terror and run home; this time the Israelis give nothing back as they occupy the Sinai, the West Bank, Gaza, and the Golan.
1973: Arabs threaten war again, but this time the Israelis don't strike pre-emptively. Arabs invade on Yom Kippur, the Israelis are truly in trouble but brilliant military leadership (especially from one General named Ariel Sharon) routs the Arabs and throws them back. Sharon even crosses the Suez Canal to prove to the SOBs that they shouldn't mess around with him. Arabs cry, whine, and sob, but the only grown-up among them is Anwar Sadat, who makes peace instead during 1977-78. Sadat is rewarded for his statesmanship by being assassinated during a military parade during 1981.
1982: terrorist incursions from Lebanon (Palestinian uprisings had been thrwarted in Jordan and Egypt) prompt Israel to invade Lebanon. Israeli Army chases the SOBs out of all of south Lebanon.
1983-2001: Arabs realize that they can't win on the battlefield and are afraid to confront Israel militarily.
2002: Arabs conduct their war through proxy using young men and women as suicide bombers.
Hope this overview helps. I guess you can tell which side I'm on.