Trump has always, as we know, been very vocal on his Twitter account. Our President has been accused of breaking the law because of his actions recently. Trump tweeted about the attack on an Iran General and many are saying what was done was illegal.
Trump wrote “if Iran strikes any Americans or American assets,” the U.S. has targeted 52 Iranian sites — “some at a very high level & important to Iran & the Iranian culture, and those targets, and Iran itself, WILL BE HIT VERY FAST AND VERY HARD.”
Also, As World War II was underway in 1943, then-Gen. Dwight D. Eisenhower issued an order to his commanders demanding the protection of historical monuments:
"Today we are fighting in a country which has contributed a great deal to our cultural inheritance, a country rich in monuments which by their creation helped and now in their old age illustrate the growth of the civilization which is ours. We are bound to respect those monuments so far as war allows."
"If we have to choose between destroying a famous building and sacrificing our own men, then our men's lives count infinitely more and the building must go. But the choice is not always so clear-cut as that. In many cases the monuments can be spared without any detriment to operational needs. Nothing can stand against the argument of military necessity. That is an accepted principle. But the phrase 'military necessity' is sometimes used where it would be more truthful to speak of military convenience or even of personal convenience. I do not want it to cloak slackness or indifference."
The targeting of cultural properties by the U.S. is indeed not allowed. The U.S. is a signatory to the 1954 Hague Convention, which requires “refraining from any act of hostility” directed against cultural property.
The convention covers “movable or immovable property of great importance to the cultural heritage of every people, such as monuments of architecture, art or history, whether religious or secular; archaeological sites; groups of buildings which, as a whole, are of historical or artistic interest; works of art; manuscripts, books and other objects of artistic, historical or archaeological interest; as well as scientific collections and important collections of books or archives or of reproductions of the property defined above,” as well as buildings and centers whose main purpose is to house such items.
It also bars using a cultural site “for purposes which are likely to expose it to destruction or damage in the event of armed conflict.” That means signatory nations can’t use such sites to house soldiers or weapons with the goal of shielding them from attack.