The Confederate army used preventive strikes first in the Civil
War. One such occurred in 1861 in New Mexico by the Texas army.
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Preventive war is an attack made on another nation because of
the possibility of it attacking you in the future. In World II both
Axis and Allies attacked neutral countries for prevention.
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An attack made on another nation because it might attack you in
the future
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An attack made on another nation because it might attack you in
the future