 Sveinn Björnsson becomes president .1946 The Keflavik Agreement .1948 Iceland receives Marshall Aid from the United States .194930 MarchRiots break out on Austurvöllur .4 AprilIceland joins the North Atlantic Treaty Organization .1951 The United States Army establishes a base in Keflavík .19521 AugustExclusive economic zone extended to 4 nautical miles.
<meaning-changed>  Sveinn Björnsson becomes president .1946 The Keflavik Agreement .1948 Iceland receives Marshall Aid from the United States .194930 MarchRiots break out on Austurvöllur .4 AprilIceland joins the North Atlantic Treaty Organization .1951 The United States Army establishes a base in Keflavík .19521 AugustExclusive economic zone extended to 4 nautical miles.
 Sveinn Björnsson becomes president .1946 The Keflavik Agreement .1948 Iceland receives Marshall Aid from the United States . |- |rowspan="2" style="text-align: right;"|1949||30 March||Riots break out on Austurvöllur .4 AprilIceland joins the North Atlantic Treaty Organization .1951 The United States Army establishes a base in Keflavík .19521 AugustExclusive economic zone extended to 4 nautical miles.