Each other vs. one another
The primary difference between ”each other” and ”one another” is that “each other” is more frequently used when referring to two people only, whereas “one another” is used when referring to more than two people.
For example, you might say, “John and Jane are fighting with “each other,” to describe a disagreement between two people. Alternatively, you might say, “The team members are helping “one another,” to describe how everyone on the team works together.