diff --git a/airdef-core/tests/scenarios.rs b/airdef-core/tests/scenarios.rs
index 33ddcb0..e7b1936 100644
--- a/airdef-core/tests/scenarios.rs
+++ b/airdef-core/tests/scenarios.rs
@@ -35,3 +35,47 @@ fn same_seed_same_result() {
     let b = harness::run(&harness::logistics());
     assert_eq!((a.ticks_run, a.launched, a.kills, a.hits, a.fired, a.ground_queries), (b.ticks_run, b.launched, b.kills, b.hits, b.fired, b.ground_queries));
 }
+
+#[test]
+fn overlapping_mass_strikes_on_flat_world() {
+    use airdef::sim::{Aim, Approach, DroneKind as D, Ground, Out, RaidOrder, Sam, Sim};
+    use glam::DVec3;
+    let sc = harness::big_smart();
+    let terrain = harness::Terrain::Flat(70);
+    let mut sim = Sim::new(sc.seed);
+    sim.damage = false;
+    for unit in &sc.units {
+        let id = sim.id();
+        sim.sams.push(Sam::new(id, unit.kind, DVec3::new(unit.pos.x, 70.0, unit.pos.z), unit.heading));
+    }
+    sim.targets = vec![DVec3::new(0.0, 70.0, 0.0)];
+    sim.target_health = vec![100.0];
+    // Exact composition of the menu's "Массированный удар" preset.
+    let order = RaidOrder { kinds: vec![(D::Gerbera, 8), (D::Shahed, 12), (D::Geran3, 4), (D::Kh101, 4), (D::Kalibr, 4), (D::Kh22, 2), (D::Iskander, 2)], approach: Approach::AllSides, aim: Aim::Smart, dist: 4000.0 };
+    let mut ground = Ground::default();
+    let mut pending = Vec::new();
+    let mut out = Out::default();
+    let targets = sim.targets.clone();
+    assert_eq!(sim.order_raid(&order, &targets, &mut out), 36);
+    let mut second = false;
+    let mut peak = 0;
+    for now in 1..=12000 {
+        if !second && !sim.planning() {
+            assert_eq!(sim.order_raid(&order, &targets, &mut out), 36);
+            second = true;
+        }
+        ground.answer(std::mem::take(&mut pending), now);
+        out = Out::default();
+        sim.step(&mut ground, None, &mut out);
+        let wanted = ground.take_wanted();
+        pending = wanted.into_iter().map(|(x, z)| (x, z, 70)).collect();
+        let sections = ground.world.take_wanted(now);
+        ground.world.serve(&terrain, sections, now);
+        peak = peak.max(sim.drones.iter().filter(|d| d.alive()).count());
+        assert!(sim.drones.iter().all(|d| d.pos.is_finite() && d.vel.is_finite()));
+        if sim.launched >= 72 && peak > 36 { break; }
+    }
+    eprintln!("overlapping mass strikes: launched {}, peak airborne {peak}", sim.launched);
+    assert!(second && sim.launched >= 72, "second raid failed to launch; launched {}", sim.launched);
+    assert!(peak > 36, "raids never overlapped; peak {peak}");
+}