Because they wanted a little dick
Because their racsist
The US Congress.
On 13 May 1846.
For one, the message the US intercepted from Germans, meant for Mexico for Mexico to declare war against the US
Because of the Thornton Affair.
RMS Lusitania was sunk by German U boatThe US did declare war on Germany during the World War 1 because Germany had offered Texas, California, Arizona and New Mexico to Mexico.
Telegraph (as in Zimmerman Telegram)
No.
if texas was admitted to the union, mexico would declare war on the us
Initially, the US was to remain neutral in World War I but in 1917 Germany attempted to form and alliance with Mexico. Also, Germany began sinking US ships. These events led the US to declare war on April 6, 1917.
It was called the Thornton Affair involving an encounter between US Troops and the Mexican Army. Men died after shots were fired and the US Congress declared War on Mexico.
To my knowledge the US never declared war on Texas. However, after Texas became a US state it did lead to a declaration of war on Mexico. And Texas was at war with the US during the Civil War, but that was because Texas seceded from the Union and joined the Confederacy.