Western Hemisphere, Earth.
Canada, the United States, Mexico, Guatemala, Belize, El Salvador, Honduras, Nicaragua, Costa Rica, Barbados, Argentina, Uruguay, Ecuador, Peru, and more than fourteen other nations all received Marshal Ross's order at the same time, activating the preheated Large Particle Heavy Cannons, Large Solar Thermal Cannons, Large Super Electromagnetic Cannons, Supergiant Rail Cannons, and more.
These massive cannons were powered by the controllable nuclear fusion energy generators He-El had originally spread around.
The countries had initially intended to use controllable nuclear fusion as the central energy source for their cities, aiming to create capitals of clean energy. But with the arrival of the alien invasion war, they could only urgently repurpose it as a weapon power source.
This barrage was aimed at Thanos's mothership. At the very least, they had to bring down the mothership lying across the sky and deny the enemy air superiority.
The entire Earth seemed to be shoved by the heavy cannons of the Western Hemisphere. The planet trembled with thunderous roars as enormous, dazzling beams, electromagnetic shells, railgun rounds, and more rose from heavy artillery bases across the nations, all firing at Thanos's mothership.
Boom, boom, boom—
There was almost no time to react. This massive concentrated assault crossed fifty thousand meters in merely 0.5 seconds, striking destroyers beside the mothership along the way and blasting many of them apart, turning the sky into bursts of fireworks.
This proved that humanity was not utterly powerless, lifting the spirits of the many generals in the command room and Marshal Ross.
The various massive cannons that passed the destroyers struck Thanos's mothership. A diamond-shaped shield emerged around its hull, blocking the enormous Beam Cannons and Solar Thermal Cannons as sparks sprayed endlessly with a sizzle, sizzle, sizzle.
Boom!
On the other side, a specially manufactured shell