Timeline of May 1948

May 1:
Lebanon and Syria decide to send troops to Palestine at end of Mandate on May 15th. 
May 2: Iraq dispatches troops to town of Mafraq, in Transjordan, en route to Palestine after May 15th. Three planeloads of arms for Haganah arrive from France. 
May 3: Between 175,000 and 200,000 Palestinian refugees are reported to have fled from areas taken by Zionists.  Jewish colonists from Gush Etzion, south of Jerusalem, ambush traffic on road to city. 
May 4: Unit of Transjordan Arab Legion, operating in Palestine under British command, shells Gush Etzion in retaliation for ambush.
May 5: ALA unit under Michel Issa withdraws from Jaffa, ending city's resistance. 
May 6:
May 7:
May 8:
May 9:
May 10:
Haganah enters Jaffa. 
May 11: Haganah captures Safed and surrounding villages. 
May 12: State of emergency declared in all Arab countries and able-bodied Palestinian men barred entry to them.  Egyptian parliament decides to send troops to Palestine at end of Mandate. 
May 13: Arrival of second and third Czech arms consignments for Haganah. 
May 14: Arab Legion, ALA and local militia attack and capture Jewish settlements of Etzion bloc, retaliating for attacks on Hebron road. Jaffa formally surrenders to Haganah.
May 15: State of Israel proclaimed in Tel Aviv at 4pm. Haganah launches Operation Schfifon for capture of Old City of Jerusalem. 
May 16: British Mandate ends. Declaration of State of Israel comes into effect. President Truman recognizes State of Israel.
May 17: Haganah captures Acre. 
May 18: Syrian troops retake Palestinian town of Samakh, south of Lake Tiberias, and capture Zionist colonies of Shaar Hagolan and Masada.
May 19: Haganah breaks into Old City of Jerusalem. Arab Legion comes to the rescue of Old City. 
May 20: UN Security Council appoints Count Folke Bernadotte as its mediator in Palestine.
May 21:
May 22
: Security Council resolution calls for cease-fire.
May 23:
May 24:
May 25:
May 26:
May 27:
May 28:
May 29:
May 30:
May 31:


Reference: http://www.alnakba.org/chronology/sixth.htm