The ships of both sides were entangled in space, neither willing to allow the other to approach the planet's orbit to support ground battles.
However, both sides always managed to catch such opportunities.
The other side's ships would quickly arrive to relieve and the orbital cannons on the ground would often open fire at this moment. Soon, the starships attempting to interfere with ground battles would be driven away.
However, bringing up new resources doesn't take long; in a short while, a few missiles, Colossal Cannon shots, and Light Spear fire can significantly alter the ground battle.
Both sides had to rely more on orbital cannon arrays to drive away enemy ships and intercept orbital bombardments.
Intercepting was necessary not only for occasional orbital strikes from starships but also for enemy land-based missiles.