What if entry hex is blocked?

A2.5. If entry hex for reinforcements is blocked by Blaze/Rubble or enemy units, entry must be made in non-obstructed hex within four hexes of the scheduled entry point but one Game Turn later. If all hexes are still obstructed, the radius of permissible entry is extended another four hexes in both directions at cost of another turn’s delay and so on. Delay entry can never be voluntary and can never be used to appear on the other side of the river/canal.