teched_army_fords_water_then_attacks_enemy_on_far_landmass: end-to-end proof of
the conquest payoff that motivated p3-18. Over an ocean-wall map, a player-0 army
with ocean_navigation embark fords the ocean column to landmass B (process_move_requests),
then strikes a player-1 unit waiting there (queued AttackRequest → process_pvp_combat):
a cross-water battle resolves and the enemy takes damage. Embark turns an
otherwise-unreachable rival on another landmass into an attackable one.
Deterministic, cargo-verifiable; complements P6-core (the ford proof). The full
headless 1v1-to-game_over demo is the only remaining (confirmatory) P6 item.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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