Trench coat was first made at the time of World War I. At that time, only military and people who are entitled to wear that coat type. The form is rigid, long sleeves, wide collar with large buttons, and wrapped by a belt around the waist, and the addition of ‘shoulder straps’ and D rings, reinforce the characteristics of the British Army
Trench coats for women can actually be worn for various occasions, to the office, hang out,even to the party. Just choose the appropriate materials and style as it's a fashion item which is favored by women.
Trench coat can be an investment for the collection of women’s wardrobe. You could pair the same trench with different bottoms and tops to get a very different and new look. The look could vary from casual chic to formal depending upon how you decide to accessorize and decide to carry the look forward.