Saga shows how a family grows in number and grows closer together as a result of conflict.
I feel like war can either bring families together like it did in Saga or it can do the opposite where it pulls people apart. A semi-similar thing I can think of to Saga is during World War II where Jewish families were protected by others a la Anne Frank. Well, I guess those are families in the biological/genetic sense, but those who were related did grow closer because they had to. In addition, it brought them closer to families they weren’t related to. At the same time, conflict and wars can do the exact opposite especially when family members come from different backgrounds and disagree.