What was the main cause for the end of reconstruction

Compromise of 1877

Explanation: The Compromise of 1876 effectively ended the Reconstruction era. Southern Democrats' promises to protect civil and political rights of blacks were not kept, and the end of federal interference in southern affairs led to widespread disenfranchisement of blacks voters

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.