Evaluate how alliances caused great powers to come to each other's aids in the event of an attack.

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The alliances formed before the world wars, or even those formed during the period, were motivated by diverse motives: ideological and political proximity, common interests and even cultural and ethnic identity. Thus came the union of USA and England, for example, or even Austria and Germany. When the war began, the union of these groups was instrumental in preserving the diplomatic structures, and the aid they promoted among themselves was of fundamental importance in the course of the conflict.

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