how to sync a struct of numbers

Hey! I'm currently working on a multiplayer turn base strategy game and i kinda got stuck. I save the layout and the attributes (like hp) of all troops on a struct and i want to give that struct to all players so that they can update their world. the thing is i don't know how to sync a stuct. I saw a post about using unet messages but I have no idea on how they work.

This is the struct that needs to be synced.

 public int unitcount;
 
     public struct unitmanag
     {
         public int unitlayoutx;
         public int unitlayouty;
         public int hp;
         public int dmg;
         public int def;
         public int unittype;
         public int movepts;
         public int maxhp;
     };
 
     public unitmanag[] unitmag = new unitmanag[10000];