Original sentence: Additionaly, there are numerous confirmations from Czech army officers of the time speaking of "Operation Krkonose", plan of armed invasion of Poland, because of were which many units of the People's army of the Czechoslovakia stationed on highest alert, ready for deployment within hours
Edited sentence: Additionally, there are numerous confirmations from Czech army officers of the time speaking of "Operation Krkonose", plan of armed invasion of Poland, because of were which many units of the People's army of the Czechoslovakia stationed on highest alert, ready for deployment within hours