Dee ihe na-aga n'ihu maka paragraf a - Ọ sonyeere Warsaw Pact na Mee 14, 1955 na ihe omume na njikọ ahụ gụnyere Warsaw Pact Invasion
nke Czechoslovakia. N'oge na-adịghị anya na May 1968, Main Political Directorate nke BNA malitere mkpọsa mgbasa ozi iji kọwaara ndị agha ihe ndị mere na Czechoslovakia. Ọzụzụ ndị agha malitere ozugbo na mbido July, ma ka ọ na-erule ngwụsị nke ọnwa ahụ, a na-eduzi ya na Bulgaria n'okpuru nchịkwa nke ndị isi ndị Soviet. E zigara ndị ọrụ abụọ a họpụtara (ndị agha 12th Motorized Rifle Regiment na 22nd Artillery Regiment nke ndị ọchịagha Alexander Genchev na Colonel Ivan Chavdarov n'otu n'otu) na mpaghara Soviet, ebe ha gafere n'okpuru iwu Soviet. Nkwadebe ndị agha na nke echiche biri na August 20, mgbe Kansụl Ndị Minista kpebiri na mba ahụ kwesịrị isonye na ntinye aka na Czechoslovakia.