A war of attrition.
World War 1 is an example of this.
Answer:
Many families were living in poverty and needed their children's income to survive
Answer:
giving the "most power" to the national government, letting the president direct the executive branch, and having a "firm system of checks and balances"?
Other countries entered the on-going civil war and dividedly supported the republican or the nationalists. The German intervention triggered World War II when it supported the Nationalists, while France and Britain supported the Republicans. The military interventions led the countries to war.
Germany provided heavy military training and tactics to the Nationalists that later was formed as the Condor Legion, which led the Nationalists military. The Condor Legion experienced successive victories because of their rigorous training, however, in the end, they were defeated by Britain's army.
