Howitzers are a key weapon in mountain warfare, esp. with the Red Chinese using human wave attacks as they did against India in the past.
Now, if they use Flechettes in their shells, it will be “Fed the Vultures” times in the Himalayas.
You use a mix of VT fuzing and some impact fuzing against human wave attacks. VT provides airbursts for killing and wounding large numbers at once. But the impact rounds are mixed in for the morale effect. In Korea we found that the biggest impact to morale was for a Chicom to see his buddy torn to pieces a few meters from him. Airbursts tend to wound and kill relatively ‘neatly’. Impact fuzing causes a lot more shock.