Answer:
Although for a time the bubonic plague stunted the growth of many places, especially Europe, after the major outbreaks had passed, places in Europe thrived. Less people meant more resources for the remaining population. Due to fewer workers, workers became much more valuable. As a result, wages increased considerably. There was much more food for the remaining people which meant less people starved. These factors put together opened up opportunities for people to move up in the social classes. The standard of living overall was vastly improved which contributed to innovation and led to the emergence of the reissuance.
Hope this helps!
Art and architecture get spread by different artists and architects/builders being exposed to a certain type of art. While in the past this has been done through travelling. Nowadays, artists or architects can simply look a certain style up and already be influenced by it.
The battle that took place mainly on the land was the Battle of Okinawa. The Battle of the Coral Sea, Midway, and the Philippine Sea all took place on water.