Why was the Zimmerman Telegram a contributing factor to the U.S. declaration of war? Responses It contained military commands from the Germans to the Mexican government. It contained military commands from the Germans to the Mexican government. - no response given It showed that Mexico was passing U.S. military secrets to the Germans. It showed that Mexico was passing U.S. military secrets to the Germans. - no response given It promised Mexico that Germany would help it reclaim territory in the U.S. if Mexico entered the war against the United States.
This promise of territorial gain for Mexico in exchange for joining Germany in the war against the U.S. angered and alarmed the American government, ultimately contributing to the U.S. declaration of war on Germany.
