The importance of the Battle of Agincourt has more than the standard military implications. Beyond being a crushing blow to the French and allowing the English a chance to renew their campaign, it provided something that is far more important, an important cultural reference.

While the Battle will always be remembered for it's stunning victory, it provided something that is still used to this day, the famous St. Crispian's Day Speech from Henry V. One of Shakespeare's most famous speeches that is frequently referenced and more recently used by Stephen Ambrose for his "history" of the 506th Parachute Infantry Regiment.

Is it worth celebrating? That I can't touch, that's something for the English historians and English nationalists to debate. However, I will speak about battles.

Some battles are important points in history, and are usually far more clear than others. We can talk about FDR's 100 Days and how it changed the Depression, but many things were undone over time and challenged in the Supreme Court, but we know about the Battle of Pearl Harbor as a very clear beginning of US involvement in WW2. The same goes for the French Revolution. While there is large debate as to when and if the Revolution ended with Napoleon or because of Napoleon but we can say with certainty that the progress of the Revolution ended at Waterloo and the final defeat of Napoleon.

Events in history have a very odd place in history due to popular public perception and the ease of the public to use battles as markers within history. Once you step into more professional historiography, you realize the relative unimportance of battles compared to campaigns, logistics, home efforts, politics, and diplomacy.