What was the military consequence of the lack of unity among greek city-states?

the armies couldn't be unified to stop an enemy from attakingand made them seem weaker and easier to invade

answer; ///i believe that the correct answer is because the house and senate frequently pass different versions of the same bill;

answer; (c) on the left side; ; ; ; ; ; ; ; ; ; ; ; ; speech is localized on the left side of the brain;