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The Loop (Games)
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"British infantry hitpoints increased but march more slowly."—In-game description
Thin Red Line is a technology in Age of Empires III that is unique to the British and can be researched at the Church once the The Glorious Revolution Home City Card has been sent. Once researched, it increases the hit points of all infantry by 20% but reduces their speed by 25%.
See also 
Edit
- Grand Encampment – similar technology for the campaign-only United States
| Unique Church/Mosque technologies in Age of Empires III | |
 Age of Empires III | |
|---|---|
 British | Thin Red Line · The Black Watch · Roger's Rangers |
 Dutch | Coffee Trade · Waardgelders · Stadhouders |
 French | Code Napoleon · Garde Imperial 1 · Garde Imperial 2 · Garde Imperial 3 |
 Germans | Tilly's Discipline · Wallenstein's Contracts · Zweihander |
 John Black's Mercenaries | Indian Friendship · Customized Merc Weapons |
 Knights of St. John | Corselet · Tax Burden · High Crusade |
 Ottomans | Tufanci Corps · Topcu Corps |
 Portuguese | Encomienda Manor · Besteiros · Order of the Tower and the Sword |
 Russians | Westernization · Kalmucks · Petrine Reforms · Bashkir Ponies |
 Spanish | Corselet · Quatrefage · Wild Geese |
 United States | Grand Encampment · American Patriots |
| All of the listed technologies require the Royal Decree Home City Cards unique for each civilization | |
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