Regardless of where and under what circumstances the people who populate War and Peace find themselves, they are always only one step away from creating a circle of domesticity. Even soldiers in-between battles cannot help but revert from the insanity of warfare to the normal human behavior of setting up a home of sorts, breaking bread together, and offering hospitality to strangers and even enemies. The quest for home is a subtle and ever-present desire in the book, and a way for Tolstoy to underscore the basic humanity underlying the individuals who make up a terrifying war machine.
In the novel, people are portrayed as desperately needing home. This is why domestic spaces tend to break out in even the most unlikely places, such as an army camp in the middle of the battlefield. For Tolstoy, the desire for a home is the defining feature of what makes humans human.
In the novel, the disruption and destruction of one's home is just as traumatic as the loss of a loved one.