Amulius had his niece living in a temple. Then Mars, the god of war, visited her in the temple and they fell in love. Rhea Silvia, Amulius' niece, gave birth to twin boys. Amulius got mad and sent out two orders to get the twins and throw them out into the Tiber River. Amulius thought they died, but they didn't.
The twins eventually floated onto shore and a she-wolf found them. She was going to eat them, but she brought them home to her den.
Their Grandfather Found Them
Who are you?
Your grandfather. I have came to ask you a few questions.
Once the she-wolf brought them back to her den, she raised them like wolves and they ate like wolves.
Romulus Becomes King
I am king!
One day Romulus and Remus were taking a walk on a trail when a random farmer saw them walking like a wolf, and kidnapped them and took them to his home. They were then raised like humans and were taught to eat like humans.
Their grandfather heard about them and went out to look for the twins and he found them.
Long story short, Romulus and Remus founded Rome and fought over what to name it and what hill to build it on. Eventually Romulus got mad at Remus because he was teasing him and through a rock at his head and killed him on the spot. Then Romulus became the first king of Rome.