Why did Texas have to become its own
country instead of joining the US?

Along with the rest of Mexico, Texas gained its independence from Spain in 1821 following the Treaty of Córdoba, and the new Mexican state was organized under the Plan of Iguala, which created Mexico as a constitutional monarchy under its first Emperor Agustín de Iturbide.

nuclear fission produces the atomic bomb, a weapon of mass destruction that uses power released by the splitting of atomic nuclei the fighting in iwo jima and okinawa affected the allies' pacific strategy because truman decided to drop the atomic bomb on mainland japan.

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