Six-Day War
After the first air attack, the ground war started in the Sinai Desert. Israeli troops moved forward quickly, but Egyptian intelligence initially told the troops stationed in the Sinai to let them pass since they believed it to be just a diversion of the actual main attack that was believed had not yet happend.  That made it easy for the Israeli troops to reach the city of al-Arish well ahead of schedule, at 10 p.m.