Upgrade line

1. Mangonel
2. →Onager
3. →Siege Onager

Countered by

Build these against it.

• Bombard CannonBombard Cannon · Houfnice
• Camel ScoutCamel Scout · Camel Rider · Heavy Camel Rider · Imperial Camel Rider
• CataphractCataphract · Elite CataphractByzantines
• Condottiero
• CoustillierCoustillier · Elite Coustillier
• Eagle ScoutEagle Scout · Eagle Warrior · Elite Eagle Warrior
• HuskarlHuskarl · Elite HuskarlGoths
• KnightKnight · Cavalier · Paladin · Savar
• LongbowmanLongbowman · Elite LongbowmanBritons
• Magyar HuszarMagyar Huszar · Elite Magyar HuszarMagyars
• MangudaiMangudai · Elite MangudaiMongols
• Monk
• Petard
• Scout CavalryScout Cavalry · Light Cavalry · Hussar · Winged Hussar
• Shotel WarriorShotel Warrior · Elite Shotel WarriorEthiopians
• Steppe LancerSteppe Lancer · Elite Steppe Lancer
• TarkanTarkan · Elite TarkanHuns
• Woad RaiderWoad Raider · Elite Woad RaiderCelts

Strong against

This unit is a good answer to these.

• ArcherArcher · Crossbowman · Arbalester
• Ballista ElephantBallista Elephant · Elite Ballista ElephantKhmer
• Battering RamBattering Ram · Capped Ram · Siege Ram
• Camel ArcherCamel Archer · Elite Camel ArcherBerbers
• CaravelCaravel · Elite CaravelPortuguese
• Cavalry ArcherCavalry Archer · Heavy Cavalry Archer
• Chu Ko NuChu Ko Nu · Elite Chu Ko NuChinese
• ConquistadorConquistador · Elite ConquistadorSpanish
• Demolition RaftDemolition Raft · Demolition Ship · Heavy Demolition Ship
• Fire GalleyFire Galley · Fire Ship · Fast Fire Ship
• GalleyGalley · War Galley · Galleon
• GbetoGbeto · Elite GbetoMalians
• GenitourGenitour · Elite Genitour
• Genoese CrossbowmanGenoese Crossbowman · Elite Genoese CrossbowmanItalians
• Hand Cannoneer
• HuskarlHuskarl · Elite HuskarlGoths
• Hussite WagonHussite Wagon · Elite Hussite Wagon
• Jaguar WarriorJaguar Warrior · Elite Jaguar WarriorAztecs
• JanissaryJanissary · Elite JanissaryTurks
• KamayukKamayuk · Elite KamayukIncas
• KipchakKipchak · Elite KipchakCumans
• LongboatLongboat · Elite LongboatVikings
• Organ GunOrgan Gun · Elite Organ GunPortuguese
• Plumed ArcherPlumed Archer · Elite Plumed ArcherMayans
• Rattan ArcherRattan Archer · Elite Rattan ArcherVietnamese
• ScorpionScorpion · Heavy Scorpion
• Shotel WarriorShotel Warrior · Elite Shotel WarriorEthiopians
• SkirmisherSkirmisher · Elite Skirmisher · Imperial Skirmisher
• Slinger
• Teutonic KnightTeutonic Knight · Elite Teutonic KnightTeutons
• Trebuchet
• War WagonWar Wagon · Elite War WagonKoreans