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Hatshy [7]
2 years ago
10

During world war ii, the effectiveness of german u-boats and underwater mines was ended by the development of select one:

History
1 answer:
Artemon [7]2 years ago
8 0
<span>select one:
a. acoustic countermeasures.
b. sonar.
c. centimetric radar.
d. both sonar and centimetric radar.
e. all these answers are correct.
A quick google search said centimetric radar was invented in 1935 during the range of WWII.
Hope I helped some</span>
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To seclude and divide from another country or area.

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What was the cause and effect of a divided America between the Union (northern states) and the Confederacy (southern states)? Us
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The war began on 12 April 1861, when the rebels attacked Fort Sumter in the state of South Carolina. By 1862 large-scale fighting had developed, with large numbers killed. In September 1862, Lincoln proclaimed the emancipation of slaves. The south had now discovered genius generals in Robert E. Lee and "Stonewall" Jackson, and won numerous victories over the Unionists. Jackson was mistakenly killed by his own troops in the battle of Chancellorsville in May 1863, and Lee was defeated at the Battle of Gettysburg in the state of Pennsylvania in July 1863. In the west, an army under Ulysses S. Grant captured Vicksburg in the state of Mississippi, thus the Unionists took control of the Mississippi River.

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