What famous order did an officer, who was acutely aware of ammunition shortage, supposedly give during that battle

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the answer is title i subtitle b

lee and grant, both of whom held the highest rank in their respective armies, had known each other slightly during the mexican-american war (1846-48) and began their dialogue by exchanging awkward personal inquiries. characteristically, grant had arrived in his mud-splattered field uniform while lee had turned out in full dress attire, complete with sash and sword.

explanation:

answer; /// i believe the correct answer is (oasis)