Protocol No. 1

Protocol No. 1 is a treaty from the early 20th century that aimed to regulate the use of submarines during wartime, ensuring they are used in accordance with international law. It established principles to prevent unnecessary destruction and protect non-combatants, emphasizing that submarines must observe the rules of warfare like respecting neutral waters and avoiding unnecessary suffering. Essentially, it sought to create clearer standards for submarine conduct during conflicts, promoting humanitarian practices and reducing unwarranted damage during naval warfare.