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Wakanda, which is sitting on a rich reserve of Vibranium, is depicted as a more advanced civilization then the rest of the world in Black Panther.
In Avengers: Infinity War, during the battle of Wakanda with the Black Order, we see that they have one hell of a defense with a dome shaped energy shield, nearly impenetrable. But when the shield does get penetrated, the only weapons Wakandan's use are spears that also shoot energy blasters which are not very efficient attack weapons. The War Machine single-handedly does more damage than possibly all Wakandans.
Why was their attack so weak? Why didn't they use tanks & stuff or have aerial backup like helicopters? Why was their attack strategy focused on hand to hand combat only despite having a technologically advanced civilization?