Then , Israel beefed up her forces and , in turn , each of the other Arab countries put her armed forces on alert .
First , Egypt moved troops into the Gaza Strip , demanding that the United Nations ( UN ) Peacekeeping Force be withdrawn .
Israel beefed up her forces and , in turn , each of the other Arab countries put her armed forces on alert .
First , Egypt moved troops into the Gaza Strip , demanding that the United Nations ( UN ) Peacekeeping Force be withdrawn .