You might be interested in some previous threads on the last times swords were used in battle:

• When was the last sword used? - 34 comments, over 2 years old.
• This thread goes into examples from WW II, modern units still equipped with swords, and possible usage in the Vietnam War.
• What was the last battle in which melee weapons won out? - 2 comments, over 1 year old.
• Just as the thread title states.
• what was the last battle in which swords were used as the primary weapon? - 26 comments, over 3 months old.
• The commenters here discuss the use of the sword in relation to other melee weapons on the battlefield.