Stump pullers, wheel barrows and shovels where used to build the erie canal
The Allies gained control of the Atlantic Ocean by learning from the past and improving technology, strategies, weapons. Allies started to build large number of ships. Also people sacrificed themselves to take supplies from Canada and US to the UK. Allies developed anti-submarines weapons. Also a special group of destroyers were developed in order to set the location of U-boats.
Answer: The technological changes included the following: (1) the use of new basic materials, chiefly iron and steel, (2) the use of new energy sources, including both fuels and motive power, such as coal, the steam engine, electricity, petroleum, and the internal-combustion engine, (3) the invention of new machines, such as... Hope this helps... :D
