Israel shares borders with four sovereign countries: Egypt, Jordan, Syria, and Lebanon. Additionally, it borders on Gaza and the West Bank.
Egypt : In the first 25 years of Israel's existence, Egypt and Israel fought five wars: the War of Independence, 1956 Suez Campaign, 1967 Six Day War, 1969-1970 War of Attrition, and 1973 Yom Kippur War. In 1979, Egypt became the first Arab country to sign a peace treaty with Israel, for which it was expelled from the Arab League (but has since rejoined.) Relations between the two countries have been characterized as "a cold peace," with ties strained by multiple regional and bilateral concerns. In recent years, the two countries have been working closely to combat terror and to coordinate their policies regarding the Hamas-controlled Gaza Strip, which borders both countries.
Jordan : Although Jordan engaged in the 1948 and 1967 wars with Israel, its leaders engaged in behind-the-scenes diplomacy and coordination with Israeli leaders beginning even before 1948. The two countries signed a peace treaty in 1994. The treaty has not led to warm bilateral relations, but it is widely considered to have served both countries well since it took effect.
Syria : Syria fought in the 1948, 1967, and 1973 wars in addition to cross-border skirmishes ever since Israel gained independence, and significant but indirect roles via its Lebanese and Palestinian proxies over the years. While always tense, relations between Israel and Syria have grown even more complex in light of the ongoing Syrian civil war.
Lebanon : Along with much of the Arab world, Lebanon has been in a state of war with Israel since 1948, and bound by the terms of an armistice agreement signed in 1949. The First and Second Lebanon wars, launched by Israel in 1982 and 2006, were fought primarily by non-governmental fighting forces on the Lebanese side. These wars were launched in response to sustained rocket and terror attacks by the Palestine Liberation Organization and Hezbollah, respectively, operating from southern Lebanon.