It is. The movie takes cues from actual stories of military wives and their struggles and joys. However, some elements might be dramatized for cinematic effect.
You should check out 'American Sniper'. It's based on the true story of Chris Kyle and offers an insight into his experiences as a sniper in the military. The film accurately depicts the harsh realities and sacrifices of war.
Yes, '1408' is based on a true story. The story was inspired by a Stephen King short story of the same name. It's about a man who stays in a supposedly haunted hotel room, Room 1408, and experiences terrifying and inexplicable events.
Well, it's a bit of a mix. While it may be inspired by some true elements from 1899 such as the general state of the world, sea travel, and social hierarchies at that time, it also has a lot of fictional elements added for the sake of drama and mystery. For example, the overarching mystery plot might be a creative take on some historical uncertainties, but not directly based on a single true story.