First, only Congress can delcare war. The President can ask for a declaration of war from Congress. The first President was James Madison. He was president at the start of the War of 1812
George H. W. Bush was president during the first war with Iraq.
civil war
President Tyler was Florida's first president. He was elected after the Indian war.
Jefferson Davis - first and last Confederate President
"First president from the old south since before the civil war?"
James Madison was the first to take the country into war. It was The War of 1812.
Raymond Poincaré was President of France following the First World War.
President Mao
He fought in the Spanish American War before he beacame president.
Thomas Jefferson was the President during this undeclared war with the pirates of Tripoli ,also called the first Barbary War in 1801-1805.
He a the general of a war and everyone voted him to become president because his bravery in the war. P.S. He was the first president under the constitution the, The adams family was the first, basically there was 16 president before him but he was the first under the constitution like i said before.