Students and teachers at universities demonstrated to express their opposition to the war, while many protesters concentrated on what they considered unfair. Most of the soldiers were young.

The description provided seems to relate to the protests that took place during the Vietnam War in the 1960s and 1970s in the United States. Many students, teachers, and other groups demonstrated on university campuses and in cities to express their opposition to the war. The protests were driven by several factors:

1. Opposition to the draft: The United States had a conscription system, commonly referred to as "the draft", which required young men to serve in the military. Many people opposed the draft since it disproportionately affected young individuals, including college students. They viewed it as unfair that they were called to fight in a war that they did not necessarily support.

2. Moral objections to the war: A substantial number of protesters believed the war in Vietnam was morally wrong. They thought that the United States should not be involved in what was considered a civil conflict in Vietnam.

3. The devastation caused by the war: As the war dragged on, images and reports of the devastation caused in Vietnam, as well as the rising number of American casualties, fueled opposition and anger amongst protesters.

4. Advocacy for peace: Many protesters were part of a larger peace movement that advocated for non-violence and a diplomatic resolution to conflicts, rather than military involvement.

It's important to note that, while there was significant opposition to the Vietnam War, there were also many people who supported it and the soldiers who served.

It seems like you’re referring to protests that often took place at universities during times of war, such as the Vietnam War. During such protests, students and teachers would hold educational events, rallies, or teach-ins to explain their opposition to the war. Many were opposed to the war for a variety of reasons. One of the main arguments was that the war was unjust or that the draft system was unfair because it disproportionately affected young people, especially those from lower-income backgrounds who couldn't afford college deferments.

A key point of contention was the draft lottery system that was used during the Vietnam War, which called young men to service without much choice in the matter. Many believed that wealthier individuals or those with better educational opportunities could avoid the draft, leaving economically disadvantaged youths to serve in their place, which was seen as an issue of social inequality.