Answer:
No
Step-by-step explanation:
The decision of the United States to declare war on Mexico in 1846 did not fully satisfy the requirements of Jus ad Bellum, which are the principles that determine whether a country's decision to go to war is justifiable.
One of the key requirements of Jus ad Bellum is that a state must have a just cause for going to war. A just cause typically refers to self-defense or the protection of innocent civilians. In the case of the U.S. war with Mexico, however, the justification for going to war was based on disputed territorial claims and the desire to expand the nation's borders. Therefore, the U.S. did not have a just cause for going to war with Mexico.
Another requirement of Jus ad Bellum is that a state must have exhausted all other options before resorting to war. In this case, it can be argued that the U.S. did not exhaust all other options, such as diplomatic negotiations or international arbitration, before deciding to declare war on Mexico.
Furthermore, the U.S. declaration of war on Mexico was controversial and not supported by all members of Congress. Some members argued that the war was unjustified and that the U.S. had provoked Mexico into military action.
Overall, the U.S. decision to declare war on Mexico did not fully satisfy the requirements of Jus ad Bellum, and as such, can be considered unjustified according to international law principles.