/usr/share/games/wesnoth/1.10/data/campaigns/Eastern_Invasion/maps/ is in wesnoth-1.10-ei 1:1.10.2-1.
This file is owned by root:root, with mode 0o755.
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/usr/share/games/wesnoth/1.10/data/campaigns/Eastern_Invasion/maps/01_The_Outpost.map
/usr/share/games/wesnoth/1.10/data/campaigns/Eastern_Invasion/maps/02_The_Escape_Tunnel.map
/usr/share/games/wesnoth/1.10/data/campaigns/Eastern_Invasion/maps/03_An_Unexpected_Appearance.map
/usr/share/games/wesnoth/1.10/data/campaigns/Eastern_Invasion/maps/04a_An_Elven_Alliance.map
/usr/share/games/wesnoth/1.10/data/campaigns/Eastern_Invasion/maps/04b_The_Undead_Border_Patrol.map
/usr/share/games/wesnoth/1.10/data/campaigns/Eastern_Invasion/maps/04c_Mal-Ravanals_Capital.map
/usr/share/games/wesnoth/1.10/data/campaigns/Eastern_Invasion/maps/05_Northern_Outpost.map
/usr/share/games/wesnoth/1.10/data/campaigns/Eastern_Invasion/maps/06_Two_Paths.map
/usr/share/games/wesnoth/1.10/data/campaigns/Eastern_Invasion/maps/07a_The_Crossing.map
/usr/share/games/wesnoth/1.10/data/campaigns/Eastern_Invasion/maps/07b_Undead_Crossing.map
/usr/share/games/wesnoth/1.10/data/campaigns/Eastern_Invasion/maps/08_Training_the_Ogres.map
/usr/share/games/wesnoth/1.10/data/campaigns/Eastern_Invasion/maps/09_Xenophobia.map
/usr/share/games/wesnoth/1.10/data/campaigns/Eastern_Invasion/maps/10_Lake_Vrug.map
/usr/share/games/wesnoth/1.10/data/campaigns/Eastern_Invasion/maps/11_Captured.map
/usr/share/games/wesnoth/1.10/data/campaigns/Eastern_Invasion/maps/12_Evacuation.map
/usr/share/games/wesnoth/1.10/data/campaigns/Eastern_Invasion/maps/13_The_Drowned_Plains.map
/usr/share/games/wesnoth/1.10/data/campaigns/Eastern_Invasion/maps/14_Approaching_Weldyn.map
/usr/share/games/wesnoth/1.10/data/campaigns/Eastern_Invasion/maps/16_Weldyn_under_Attack.map
/usr/share/games/wesnoth/1.10/data/campaigns/Eastern_Invasion/maps/17a_The_Duel.map
/usr/share/games/wesnoth/1.10/data/campaigns/Eastern_Invasion/maps/17b_Weldyn_Besieged.map
/usr/share/games/wesnoth/1.10/data/campaigns/Eastern_Invasion/maps/Throne_Room.map