Which two countries fought the 'Football War'?

George Orwell described international football as war without guns. In the run-up to the 1970 World Cup two rival nations dispensed with the 'no guns' rule. 

El Salvador and Honduras are neighbours in Central America.
 
In June 1969 they play each other to qualify for the 1970 World Cup. Honduras win the first game at  home 1-0, but a week later El  Salvador win the return match 3-0. 

At this time, goal difference is not counted so the two teams are level. They now have to play a replay. 

El Salvador beat Hounduras, Mexico City 1969

Two weeks later the replay takes place in Mexico City in a very tense atmosphere. 

The score is 2-2 at the end on normal time. In extra-time El Salvador scored a dramatic winning goal. 

Riots after  the game quickly turned into a shooting war between the two  countries. Though th fighting only lasts a 100 hours  around three thousand people are killed. And the war did not officially end until October 1980