What are examples of major tactical victories that were a disaster

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What are examples of major tactical victories that were a disaster strategically?

Take the Battle of Coronel for example

>WW1
>British and German squadrons running around South America, don't expect to actually meet each other
>They meet each other
>British squadron outmatched but ordered to fight
>absolutely decimated
>German commander awarded with flowers
>"These will do nicely for my grave"
>British are shocked by the loss and send a proportionately massive force
>Germans wiped out while trying to escape the theater