The Sinaloan and Gulf Cartels called for a ceasefire. They’re going to divide the drug trade and stick to their sides. The Drug Cartels realized they were about to be the biggest losers in this war unless they stopped competing.

This is because of various pressures like the Mexican government’s crackdown and the Cartels loss of control over their own paramilitaries like the Zetas. This won’t end the fighting of course.