After the First Airship Demonstration(?):

The Kingdoms’ Alliance Plunged Into Chaos.

“If Lenslethian airships appeared in the sky and attacked our cities… could we stop them?”
“Your concern is valid, Mayor. The Lenslethians are dangerous! They smile now and call us friends, but we all know the truth—there are no eternal friends in this world!”

The Alliance began to view their new neighbor, Lensleth, with growing suspicion. In some cases, even more so than the Empire.

“Are the Lenslethians really that amazing? So what?”
“I wouldn’t mind if they ruled over us. They seem capable enough.”

Meanwhile, the commoners in the various kingdoms and the citizens of Bedenheim had entirely different views from their rulers.

“We must foster magical engineering immediately!”
“But how? They’ve already entered the Golden Age!”