Nixon told the Israels that if Ariel Sharon who had crossed the Nile river and surrounded the Egyptian 3rd army had he destroyed that force then he Nixon would not rearm and resupply Israel. In every war up until recently Israel could have smashed their enemy completely but was stopped by the U.S. gov’t.
In the case I am referring to, Israel was not in a position to smash anybody until after the resupply. The Tanks were rolling off the transport plane and going straight into battle. Israel would have lost without it.
Here is one helpful link: http://www.palestinefacts.org/pf_1967to1991_ykwar_course.php
There are more detailed accounts that give additional information of the parlous situation of Israel after the suprise attack.