WW1, Spanish Civil War, WW2 wars

In your 3 - 5 sentence response (it may exceed that, by the way), please write about how the wars (WW1, Spanish Civil War, WW2) informed and/or influenced Joan Miro and/or other artists. Consider writing about how psychology (the subconscious, the irrational, dreams, etc.) played a major part in the work and philosophy of Surrealist artists and writers.
What is your overall impression of Joan Miro or Surrealism as a whole?