extern int lnd_support(natid, natid, coord, coord, int);
extern int lnd_can_attack(struct lndstr *);
extern int lnd_fortify(struct lndstr *lp, int hard_amt);
extern int lnd_support(natid, natid, coord, coord, int);
extern int lnd_can_attack(struct lndstr *);
extern int lnd_fortify(struct lndstr *lp, int hard_amt);