First, Twentieth, and Twenty-First to nuke "technocity" (nation id: 334649) who is a Leader in The Guardian Knights. 

Additionally, single-handedly fought him off even while he had a significantly superior and larger military than my own

National Day of Independence: June 11th

History: 

2005 - 2008: Veridia falls into civil war, with multiple factions fighting for independence. 

2008 - 2009: Militias in Veridia's Northern District struggle to fight against each other and Veridia. They form a temporary alliance called the "Frontline Defense Union" to coordinate attacks against Veridia. 

2009 - 2010: Veridia attempts diplomatic and peaceful resolutions between all factions within its borders over the next two years. Promises are made that those under the "Frontline Defense Union" will not be persecuted if peace is made, and their own political party will be allowed to stand within Veridian Parliament. 

As a result, the Frontline Defense Union votes to become "The Liberty Rangers" (TLR). 

Late 2010: Within weeks of initial peace talks, TLR representatives are sent to Veridia but are assassinated within minutes of stepping on Parliament grounds. The killers are never found, and conflicts resume. All resolutions of peace between TLR and Veridia are disbanded because TLR members believe Veridia is to blame, mainly due to the fact that Veridian police officers refuse to properly investigate the assassinations.

-----------------EDIT LINE-------------------

On June 11th, 2012, Veridia viewed their Northern District as an autonomous zone, yet still claimed it as Veridian territory. 

However, it took 18 months of even fiercer border clashes and multiple attempted terrorist attacks by Veridian special forces before Mackinacora was recognized as a separate entity by Veridia.