Complex sentence: By July, the reserve force of 40,000 ZNG troops was assigned to 19 brigades and 14 independent battalions; however, they did not possess sufficient heavy or small arms for all their personnel.
Split into simpler sentences: By July, the reserve force of 40,000 ZNG troops was assigned to 19 brigades and 14 independent battalions. The reserve units did not possess sufficient heavy or small arms to arm all of their personnel.