Friends, acquaintances, and employees wore mourning to a greater or lesser degree depending on their relationship to the deceased. Mourning was worn for six months after the death of a sibling. Parents would wear mourning for a child for "as long as they so disposed". A widow was supposed to wear mourning for two years, and was not supposed to enter society for 12 months. No lady or gentleman in mourning was supposed to attend social events while in deep mourning. In general, servants wore black armbands when there had been a death in the household. However, amongst polite company, the wearing of a simple black armband was seen as appropriate only for military men, or others compelled to wear uniform in the course of their duties—a black arm band instead of proper mourning clothes was seen as a degradation of proper etiquette, and to be avoided. In general, men were expected to wear mourning suits (not to be confused with morning suits) of black frock coats with matching trousers and waistcoats. In the later interbellum period between World War I and World War II, as the frock coat became increasingly rare, the mourning suit consisted of a black morning coat with black trousers and waistcoat, essentially a black version of the morning suit worn to weddings and other occasions, which would normally include coloured waistcoats and striped or checked trousers.