Dee ihe ọzọ n'isiokwu a - N'izu mbụ nke mbuso agha Warsaw Pact na Czechoslovakia
n'ọnwa Ọgọstụ n'afọ 1968, Havel nyeere ndị na-emegide ọchịchị aka site n'ikwu okwu n'ikuku site na ụlọ ọrụ Radio Free Czechoslovakia (na Liberec). Mgbe mkpagbu nke Prague Spring na 1968, a machibidoro ya ihe nkiri ma bụrụ onye na-arụsi ọrụ ike na ndọrọ ndọrọ ọchịchị. Ọ nwetara ọrụ n'ụlọ ọrụ Krakonoš na Trutnov, ahụmịhe o dere banyere ya n'egwuregwu ya "Ndị na-ege ntị". Egwuregwu a, tinyere egwuregwu abụọ ọzọ "Vaněk" (nke a na-akpọ n'ihi agwa na-emegharị Ferdinand Vaněk, onye na-anọchi anya Havel), ka a na-ekesa n'ụdị samizdat n'ofe Czechoslovakia, ma gbakwunye na aha ọma Havel nke ịbụ onye isi na-emegide ya (ọtụtụ ndị edemede Czech ndị ọzọ mechara dee egwuregwu nke ha na-egosi Vaněk). A kwadoro aha ọma a na mbipụta nke "Charter 77" manifesto, nke edere na nzaghachi maka ịtụ mkpọrọ nke ndị otu Czech psychedelic rock band The Plastic People of the Universe; Havel gara ikpe ha, nke gbadoro ụkwụ na ndị otu ahụ enweghị nkwekọ na inwe ogologo ntutu, na-eji okwu rụrụ arụ na egwu ha, yana itinye aka ha n'ozuzu na Prague n'okpuru ala. Havel so hiwe Kọmitii Na-ahụ Maka Ịgbachitere Ndị A Na-ekpe Ikpe Na-ezighị Ezi n'afọ 1979. Ihe omume ndọrọ ndọrọ ọchịchị ya butere ọtụtụ mkpọrọ site n'aka ndị ọchịchị, na nlekota gọọmentị na-aga n'ihu na ajụjụ ọnụ ndị uwe ojii nzuzo (Státní bezpečnost). Ogologo oge ọ nọrọ n'ụlọ mkpọrọ, site na Mee 1979 ruo February 1983, ka edere n'akwụkwọ ozi o degaara nwunye ya nke e mesịrị bipụta dị ka "Akwụkwọ Ozi Nye Olga".