This but unironically. In medieval total war 2 everythinh except for things like elephants had 1 hitpoint. And a certain chance to recive damage based on atack and defence values. So if the model was hit it died. And it looked much cooler. Contrast that with modern total war games like warhammer where there are health bars. a cavalary charge would send some dudes flying 20mm into the air and after bouncing several times they get up and walk back. Arrows and misiles also work in wierd ways. With the unit loosing sometimes half of its health before anybody dies.
Not really. The river was also closed to iran during the american ocupation. In fact the taliban actually released watter at some point. Less than they should have but more than the previous regime.
The border clashes have nothing to do with that and more to do with the taliban organization being run more like a mcdonalds than a regular state. Sometimes a franchise owner decide they want to invade iran and get into a shootout. But the central command in unaware of that.