Pakistan conducted air strikes on 10 locations in Afghanistan's southeastern Khost province on Thursday, targeting what it described as drone storage and launch sites used for cross-border attacks. The Afghan governor's office in Khost reported no casualties. Islamabad framed the strikes as "deliberate, precise, calibrated, and proportionate," while condemning what it called an "unlawful incursion" by Afghan-origin drones the previous day. The drone dimension is the story's sharpest edge. Previous rounds of Pakistan-Afghanistan hostility centered on ground-based militant infiltration. The introduction of drone attacks — Pakistan accusing Afghanistan of sovereign airspace violation via unmanned systems — represents a qualitative shift in how both sides project force and assign blame. It lowers the threshold for future escalation by making cross-border aggression cheaper and more deniable. The immediate trigger was a police facility attack in northwestern Pakistan last week that killed at least 21 people, claimed by a Pakistan Taliban (TTP) faction. This broke nearly three months of relative calm following the worst fighting between the two countries in years, which erupted in February 2025. On Monday, Pakistani air strikes on three locations in Kunar province's Nurgal district killed what Afghan officials said were three civilians; Islamabad claimed 28 "terrorists" dead. The civilian-versus-militant body count discrepancy is now a recurring feature of these exchanges. The structural dispute is unchanged and probably intractable. Pakistan accuses the Taliban government of harboring TTP fighters who stage cross-border attacks. The Taliban denies this, insisting the attacks are Pakistan's internal security problem. Neither side has incentive to concede the point: Pakistan needs an external enemy to justify military action and deflect from its failure to contain the TTP domestically, while the Taliban cannot admit to hosting anti-Pakistan militants without undermining its claim to sovereign governance. Four countries — China, Turkey, Qatar, and Saudi Arabia — have been attempting mediation. Each new strike cycle damages the credibility and leverage of these mediators. The pattern is familiar from other intractable conflicts: escalation, international hand-wringing, temporary calm, a triggering attack, retaliatory strikes, competing casualty narratives, repeat. Pakistan's framing of proportionality deserves scrutiny. Striking 10 locations across a foreign country's province in response to drone incursions is a significant military operation, regardless of the language used to describe it. The zero-casualty Afghan claim, if accurate, suggests either poor targeting, empty sites, or advance warning — none of which supports Islamabad's narrative of hitting active military objectives. The twenty-year trajectory here is grim. Without a mechanism to verify militant presence, attribute attacks, and enforce border discipline, these tit-for-tat strikes will become normalized. The drone element accelerates this: cheaper, more frequent, harder to attribute, easier to deny. Both governments extract domestic political value from the confrontation while border populations bear the cost.