particulars of (something)
the specific details about something
I have no knowledge of the particulars of my father's business dealings.
Most Powerful Weapons In History
MOAB GBU 43 B Massive Ordinance
During the time of its development, the Mother of all Bombs or the officially named GBU43/B Massice Ordinance was considered the most powerful nonnuclear weapon ever designed. Tested on March 11, 2003, its blast can destroy 9 city blocks with a radius of 137.61 m. A larger version of 13 tons was reportedly developed.