I believe US Grant was the first President to write about his wartime experiences.
The President who was the first to travel out of the country during war time was Theodere Roosvelt. He traveled twice in Tehran Iran the first and Yalta Ukraine USSR the second
I am not totally sure but i think it is George Wahington i think george w
me
He was the first President to travel to China, and the first President to resign from office.
Theodore was the first sitting president to leave the country. He visited Panama while he was president.
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submarine
theodore roosevelt
Woodrow Wilson
The first American President to do all these things was Theodore Roosevelt, although his flight in an airplane didn't happen until 1912, after he was President.
William H. Taft