Final answer:
The Abstract of Infantry Tactic published in 1829 was a manual that provided guidelines and instructions for infantry tactics and combat.
Step-by-step explanation:
The Abstract of Infantry Tactic published by the Army in 1829 was a manual that provided guidelines and instructions for infantry tactics and combat. It outlined various formations, drills, and movements that infantry units should execute during battles. The manual aimed to standardize and improve the efficiency of infantry operations.