When you hear of "war," what comes to mind?

I know this is a seemingly simple question, but it is a question that I'm having to keep constantly in mind when I am gathering texts and movies for the World War I project.  What does come to mind when you think about "war?"  Is war something that you conceive along the lines of images, of written words, of spoken speeches?  Are there old uniforms, musty relics lying about?  What is war to you?

Please share this, as I would greatly value any other perspectives on this, as it would help me when I start writing essays based on these materials in the coming months.