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AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
June 15, 2024
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31 ene 1917 año - Germany declared a war with the Allied Powers of submarines.

Descripción:

They declared it in 1917. The German submarines were called U boats. The Allied Powers used convoys to protect their ships. The U.S. was not involved.

Añadido al timeline:

fecha:

31 ene 1917 año
Ahora mismo
~ 107 years ago