Which of the following is considered a simple breach of the Laws of War?

The act of abusing a flag of truce is indeed recognized as a simple breach of the Laws of War. This principle is grounded in the need for respect and protection of those attempting to engage in peaceful negotiations. A flag of truce symbolizes a request for a cease-fire or negotiation, and misusing it undermines the sanctity of such gestures and the broader principles of humanitarian law designed to protect individuals in conflict.

Using banned weaponry constitutes a significant violation, as it immediately contravenes international treaties that specifically prohibit such weapons due to their indiscriminate nature and the suffering they cause. Detaining individuals without charge involves more complex legal considerations concerning due process and the rights of detainees, making it a more severe issue under the laws governing armed conflict. Intentionally targeting civilians is a grave breach and is considered a war crime, given that it directly contravenes the fundamental principle of distinction that mandates protection for non-combatants during hostilities.

In this context, the abuse of a flag of truce is understood as a less severe breach compared to those that have broader and more life-threatening implications, thereby categorizing it as a simple violation within the complexities of the Laws of War.