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The shield is a weapon of war, and Ares is god of war.
No, she didn't have a weapon of war but she kinda the started the Trojan war but no, she didn't have a weapon of war.
Thors weapon is commonly known as a war hammer or a mjolnir.
Demeter's weapon was not physical. Her weapon was related to her food-related power. Hence, her main weapon was the power of starvation.
The most widiy used weapon in the Veitnam war was the American M-16 rifle.