Also, the Sokol members greeting phrase “Nazdar!” was used in the Legion as well.
The greeting is still used in Czechia and Slovakia today.
We used this greeting in the gym class with teachers on both “basic school” (~6-15 y.o.) and “middle school” (~15-19 y.o.) and it’s still used in schools. When the class starts, the teacher says “Nazdar!” and students reply with “Zdar, Miss teacher!” At least we did it that way.
Outside school it’s an informal greeting that you can use with your friends.
The meaning of the word is “to success” or something like that (my English is limited). Literally “na” means “on” and “zdar” means “success”. It’s written together when it’s used as a greeting.