Sentence:  These <WSD>drafts</WSD> left between the 17th March and 28th April. After this there was no regular system of artillery <WSD>drafts</WSD>. A <WSD>draft</WSD> of 80 was detailed to take charge of horses on board ship as all cavalry <WSD>drafts</WSD> were for the time exhausted, and this <WSD>draft</WSD> sailed on the 30th June. 
Meaning of the word marked with <WSD> tags:  A quantity that is requisitioned.