What year did the US have their most weapons ?

the United States is known to have possessed three types of weapons of mass destruction: nuclear weapons, chemical weapons, and biological weapons. The U.S. is the only country to have used nuclear weapons in combat, when it ... As of early 2019, more than 90% of world's 13,865 nuclear weapons

Explanation:

To grow on a significant scale      

                        ( i think im not sure please let me know if i am wrong )