Answer:
The answer is
by including more detailed information about who did fieldwork for the Union and how it was done
Post the picture next time please
He did not have long to wait. On March 12, having given the Viceroy an extra day, Gandhi and seventy-eight others left his ashram and began to walk the two hundred miles to the seacoast. There, he declared, he would take a pinch of salt from the Indian Ocean, thus violating the laws of the Empire, which declared that only the British could harvest salt.
When you switch the sentence around such that the subject is being acted upon.
Here's what a sentence with active voice would look like:
John kicked the ball.
In this sentence, John is the subject, and he's kicking a ball. The subject is acting upon an object.
Now, what would happen if we made the ball the subject instead?
The ball was kicked by John.
This is passive voice. The ball is the subject, and it was acted upon by an object, in this case John.