The library subscribes to a number of databases that has information on the various wars. For example, Gale World History in Context has special topic pages for
Balkan Wars, Boer War, Cold War, Crusades, English Civil War and the Commonwealth, French Revolution, Haitian Revolution ,Hundred Years' War, Iraq War, Israeli-Arab Conflict, Korean War, Napoleonic Wars, Peloponnesian War, Punic Wars, Russian Revolution, Rwandan Genocide, Spanish Armada, Spanish Civil War, Spanish Inquisition , Thirty Years' War, Vietnam War, World Trade Center and Pentagon Attacks, World War I, World War II. These topic pages can be found here.
There are also many, many other pictures and articles about war. One good example of pictures was published in The Atlantic.