The latest episode of Mayans M.C. Season 4, "When I Die, I Want Your Hands on My Eyes," sees the titular club officially declaring war on the Sons of Anarchy following the death of Coco last week.

At the start of "When I Die, I Want Your Hands on My Eyes," which is the sixth episode of Mayans M.C. Season 4, the club gets word about the attack on Oakland during a ceremony honoring the dead.

Initially, they're unsure about just who perpetrated the attack, but Hank soon learns Oakland was able to positively identified the Sons of Anarchy as its attackers.

As the day progresses, EZ Reyes and other members of the Santo Padre charter express a desire to get revenge for Coco. 

This results in a meeting in which Alvarez again tries to say they shouldn't go to war, but EZ counters with a plan to take out the Sons of Anarchy's leadership at UC Davis.

In the end, Alvarez relents, and the Mayans M.C. declare that they're officially at war with the Sons of Anarchy.

Later, one of the Mayans M.C.'s bartenders, Jess, discovered Montez's kutte and brought it to Terry, a member of the San Bernardino Sons of Anarchy.

This gave Terry, who already wanted to attack the Mayans for a territory breach, the backing he needed from the rest of the Sons of Anarchy to attack the rival biker organization.