The "era of good feelings" following the War of 1812 reflected

rising nationalism and optimism in the United States.

Explanation:

The Era of Good Feelings was a period in the political history of America that there was a huge sense of patriotism and nationalism among the citizens after the War of 1812.

Therefore, this period marked rising nationalism and optimism in the United States.

ww1 weapons: tank. tanks were used for the first time in the first world war at the battle of the somme. they were developed to cope with the conditions on the western front. the first tank was called 'little willie' and needed a crew of 3.