Final answer:
The rank with one 1/2 inch stripe and breaks 2 inches apart is Warrant Officer 1 (WO1) in the US Army. These stripes and breaks are an identifying feature of their insignia.
Step-by-step explanation:
The warrant officer rank identified by one 1/2 inch stripe with breaks 2 inches apart, two breaks centered symmetrically on the outer face of the sleeve, is the rank of Warrant Officer 1 (WO1) in the United States Army. In the insignia for WO1, these breaks are referred to as 'blocks' and are a distinctive feature used to easily identify a warrant officer's rank. There are different insignia for warrant officers, and each has unique markings that distinguish their respective rank from one another within the military hierarchy. Warrant officers are highly specialized experts within their particular field, unlike commissioned officers who are generalists and leaders of larger units.