This is the 13073rd most frequent Russian word.
маршала
"Маршала" is the genitive or accusative singular form of "маршал," meaning "marshal" (a high-ranking military officer).
In this sentence, 'маршала' is the genitive singular form of 'маршал', referring to a military rank.
Маршала наградили за выдающиеся достижения.
The marshal was awarded for outstanding achievements.
Here, 'маршала' is used as a defining proper noun within a street name, derived from 'маршал'.
Мы живем на улице Маршала Конева.
We live on Marshal Konev Street.
In this context, 'маршала' is the possessive genitive form indicating ownership by the person holding the rank 'маршал'.