Low level planes and vehicles are not shown on map, so, the map shows only enemy presence in the sector. But once a pack of tanks start to disintegrate a friendly base, we have no warning of this attack, we must go to that sector and look what is going with the base. If an enemy bomber attack a base and destroy its radar, we have no more information about that attack except the enemy presence in the sector.
We should have some kind of warning about those attacks, for example, with the base icon drawn in a brighter or darker green. If any bomb or proyectile hits the base, its icon changes the color for 30 seconds (for example).
Another and simpler idea is to generate a "contry message" about this attack: "A1 is being attacked" and wait for 30 secs prior to repeating that message if the base gets any new hits. Same for city, HQ and factories.
In a RL situation, any attack against friendly structures should be transmitted inmediatelly via radio.