©RUNGROJ YONGRIT/EPA/MAXPPP - epaselect epa07332827 Soldiers of the Karen National Union (KNU) guerrilla group stand in position during a parade held to mark the 70th anniversary of Karen National Revolution Day at the rebel jungle stronghold in Karen State, Myanmar, 31 January 2019. The four splinter Karen armed guerrilla groups of the Karen National Union (KNU), the Democratic Karen Benevolent Army (DKBA), Karen National Liberation Army-Peace Council (KNLA-PC) and Border Guard Force (BGF) gathered and cooperated for the military parade to mark the 70th anniversary of the Karen National Resistance Day for the first time after KNU held its annually ceremony for 69 years. The Karen National Union, or KNU, is the oldest ethnic armed insurgent in Myanmar who have been fighting for an independent state known as Kaw Thoo Lei and declared war on the Burmese government on 31 January 1949, the Karen armed conflict in Kayin State also known as the Karen State in Myanmar, is one of the world's longest civil wars. The DKBA split from KNU in 1994 and fought against the KNU for a decade. The four armed rebel groups signed the nationwide ceasefire agreement with the Myanmar government in 2015.