Jus In Bello Quotes
This is true. There never has been any International law that made a belligerent responsible for civilian damages and deaths that were the result of collateral damage. However, the United States over the years, more so than any other country. Provided huge amount of aid to the citizens of the enemy nations although there was no legal obligation to do so.
The German war plan called for attacking France through Belgium. However, Belgium was intent on remaining neutral. International law prohibited a neutral country from allowing troops of either side to enter and maneuver in its territory. The Kaiser and the German leaders know they were violating International law and rationalized it by stating that after they defeated France, they would treat Belgium well.