Before the end of the British Mandate in Palestine, the United Nations passed a resolution to create two states in that territory, one Arab state and a Jewish state. Jews accepted the resolution and proclaimed the state of Israel in 1948.
The Arabs didn´t accept the UN plan and several Arab nations attacked the newly born Israel. It was the first Arab-Israeli War. Despite the large number of enemy countries, the Israelis prevailed and defeated the Arab armies.
pros they were able to colinalize and were able to do things more easily together the cons were there would be conflict and they would get raided sometimes