Perhaps it's the trench warfare -- mud, boredom and little forward motion. A murky understanding of the geopolitical climate of the time. That Americans only entered in the waning year of the conflict. Few decisive victories. Hard-to-pronounce French and Belgian names. Whatever the reason, World War I and its movies have long struggled to find their place within American pop culture. The Great War's recent centennial renewed interest in the conflict. Perhaps that's why some WWI flicks were top