Identify the characteristic of the nature of war that most requires flexibility of thought

Identify the characteristic of the nature of war that most requires flexibility of thought. Because of this characteristic, success on the battlefield depends in large part on the ability to adapt to proactively change events to our advantage as well as to react quickly to constantly changing conditions

I believe the answer would be Fluidity

Explanation:

ww1 weapons: tank. tanks were used for the first time in the first world war at the battle of the somme. they were developed to cope with the conditions on the western front. the first tank was called 'little willie' and needed a crew of 3.