[quote=@Gunther]
1. 480 BC Hell's Gate at Thermopylae [color=7ea7d8][b]300 Spartans[/b][/color] v. Persian Army
2. 22/23 December 218 BC Battle of Trebia [color=7ea7d8][b]Romans[/b][/color] v. Carthagenians 
3. 10/11 January 49 BC [color=7ea7d8][b]Caesar[/b][/color] crosses the Rubicon River in his rebellion 
4. 9 August 378 [color=8493ca][b]Eastern Roman Army[/b][/color] v. Goths
5. 6-12 May 878 [color=8493ca][b]Viking Danes[/b][/color] under Guthrum v. Wessex Army under Alfred the Great
6. 1066 Battle of Hastings [color=7ea7d8][b]English Housecarls[/b][/color] v. Norman Knights
7. 1191 Third Crusade: Battle of Acre 8 June
                       Battle of Arsof 7 September 
                       Battle of Jerusalem November 
                 [color=7ea7d8][b]Richard III Lionhart[/b][/color] & Philip II v. Islam
8. 25 October 1415 Battle of Agincourt [color=7ea7d8][b]French Knights[/b][/color] v. English bowmen
9. 21 October 1600 Battle of Sekigahara Ishida v. [color=7ea7d8][b]Tokugawa Samurai[/b][/color]
10. Seven Years War 1756 - 1763 World War
11. Napoleon wars 1798 - 1815
12. USCW 1861 - 1865
13. Spanish-American War 1898
14. Great War 1914 - 1918
15. WWII 1939 - 1945
16. Vietnam War 1967 - 1971
17. GWOT in Afghanistan 2001 - 2021
[/quote]

I really like the list presented, definitely a lot of solid choices of engagement to explore, although I do have two more possible battles, those of which being the [url=https://en.wikipedia.org/wiki/Battle_of_Tours]Battle of Tours (732)[/url] and the [url=https://en.wikipedia.org/wiki/Third_Battle_of_Nanjing]3rd Battle of Nanjing (1864)[/url]