Answer:
Done to protect against attack.
The natural disaster is EARTHQUAKE.
On the 8th of October, 2005, the Kashmir region of India and some sections of Pakistan and Afghanistan was hit by an earthquake. The earthquake had a magnitude of 7.6. The earthquake caused a lot of damages and a huge number of people lost their lives during the event, many more become homeless.
Robert Fulton is most remembered for building the first working steamboat.
It led to the revolutionary war
That is the definition of treason.