At 4 OT Memento starts shooting Hispania. The reason for this is NOT revenge like we falsely assumed, since - to quote luciano - "Memento had never any relationship with Eleonora".

According to Memento top it was Hispania who had plans to attack Memento twice, but they withdrawed both times seconds prior to the start of the shooting. Those stories and discussions can be read in older war forums on this site.

In order to prevent any future Hispania bullets, Memento decided to strike first.

The initial attack is well planned, taking down a lot of Hispania highranks in a matter of minutes. However Memento fails to take the family down completely, giving Hispania a chance to fight back. They target Memento's capos and manage to kill 3 of them, plus 1 caposuccessor, causing Memento to loose 1 spot in this war. Hispania's losses are of course far greater.
By 10:20 OT Hispania is finally down, after over 6 hours of fighting.