Animation pioneer Winsor McCay applies all his considerable skills in this feature, creating a detailed and memorable account of the sinking of the Lusitania. The technique still looks quite good, and it really brings the events to life. It must have been quite effective in its time.
There are lots of details that not only are carefully rendered, but that also are used effectively to add to the overall effect. It both communicates the factual details and brings out the horrors of the situation as well as any short feature could do. The events seem to be depicted with great care and accuracy, and only the strongly-worded commentary on a few of title cards reveals the creator's viewpoint. (It doesn't detract from the fine quality of this movie, but it's always unfortunate when entire nations of people are condemned for the barbarous or irresponsible actions of some of their leaders. It's understandable, of course, but unfortunate.)
The Lusitania sinking was one of the most notorious events in a century that saw more than enough of them. This carefully crafted movie does its job in preserving both what happened and the response to it.