His first argument didn't work, so he brought out the 'heavy artillery'. [=he started using a different and more powerful argument]
The troops were being bombarded by 'artillery'.
The troops were under heavy 'artillery' fire.
(..) Thermite. And that will cut through a lock? Because this is supposed to be one big-ass lock. In World War II... ...the Germans had an artillery piece... It's the biggest in the world. Called the Gustav Gun. And it weighed a thousand tons. And the Gustav was capable of firing a -ton shell... (..)2008 TvShow: Breaking Bad Title: A No-Rough-Stuff-Type Deal Season: 1 Episode 7