Not Quite

Camelot suffered a great blow on the first day. White City's assault was swift and didn't contain the slightest hint of mercy. 

By the time Leonel and Aina made it to the city, it was already under siege by those over thousand gliders. Realizing it was a lost cause, rather than trying to fight a losing battle, Lancelot focused all his efforts on retreat, evacuating as many as he could 

Leonel and Aina of course spent their time helping these efforts. 

Though Leonel had the crossbows now, he could at most shoot a single one at a time. This was the limitation of his Chain Domain. 

Even when he wasn't in the skies, he realized that the trouble loading the crossbows was greater than he originally thought. The amount of strength it took was astronomical and beyond him.