Wall-E (not-shown), the new found hero and leader of the human race, expressed that he would help rebuild the earth for the humans. As he was no longer a junk-bot, the Buy and Large bots turned Wall-E into a full fledged mech to help rebuild the cities.
Eve, Wall-E's love bot, helped him with this daunting task and over the years they created a utopia for the lazy and obese human beings. But as the humans became more comfortable, they soon turned the loving robots into mechanical slaves, putting the other Eve and Wall-E bots back to work.
The vile humans became abusive, dominating and inconsiderate, overworking and destroying the bots by the day. Hundreds of thousands of Eve and Wall-E's friends were killed by the people they were trying to protect.
Wall-E and Eve soon found themselves now back on the other end, being controlled yet again. Wall-E had his orders and was too introverted to talk to them.
However, Eve would not stand for it, and it would be here where the war of the robots began