The men lacked experience in warfare
To build a huge army that would march the large standing armies of Germany and Austria, which were to the numbers of 9 million, the USA had to quickly build an army, when Wilson and the nation,could no longer play dumb to Germany unrestricted submarine warfare. as a result, congress,enacted the selective recruitment act that required all men, aged between 21-28 year to register with local drafts boards, as the war raged, the years were raised to 45 years. These men had not served in the army and were simply sent to battle after very little training.
President Andrew Jackson didn't want to have a war with Mexico but also did not want to deal with adding what could be another slave State. Jackson believes that if Texas was annexed, the other countries would view the United States a traitors. He was passionate about Texas but he was more passionate about keeping the Union together.
The Mexican war was justified under the principle of Manifest Destiny <span />
Answer: Germany's Checks and balance system got taken down by Hitler. Hitler started to pass on laws about the Jews and sent troops to search and put them in concentration camps
Explanation: I hope this helps <3