Unlike Israel's southern border, however, its northern border with Syria was prone to further conflicts, rooted in disputes over the nature and boundaries of Israel's demilitarized zones. These tensions along the border became more complicated in February 1958 with the establishment of the UAR, a short-lived political union of Egypt and Syria. Escalations on the northern border were, henceforth, likely to trigger a response on the relatively quiet front in the south.[1]