Final answer:
Spain indirectly supported the American colonies during the Revolutionary War and it strained their economy.
Step-by-step explanation:
The Revolutionary War did not directly have a significant effect on Spain. However, Spain did indirectly get involved in the war due to their alliance with France. Spain provided financial support and supplies to the American colonies, hoping to weaken Britain, their rival. This strained Spain's economy and contributed to its decline as a world power in the long run.
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