The Battle of Puebla affected the Confederacy by thwarting Napoleon III's assistance plans and postponing the French invasion of Mexico, influencing the Confederacy's European support.
The Battle of Puebla impacted the Confederacy's chances of winning the American Civil War by preventing Napoleon III from assisting the Confederacy as his plan to create a pro-French monarchy in Mexico failed due to the Mexican victory in the battle. This event delayed the French invasion of Mexico, ultimately deterring France from engaging in war with the Union, which had repercussions on the Confederacy's support.
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