C290 Bounty Billions

The artillery fire accurately covered a range of 50 meters. If the explosion range of one howitzer cannon was 10 to 20 meters, then so many howitzers were concentrated in a small area, there was nowhere for them to escape to. The artillery fire only stopped after 3 minutes, the ground was plowed thrice, the 8 meters thick soil was brushed off and a huge pit was formed