Why did Stalin want to purge the Communist Party and Soviet government during the 1930s? What methods did he use to do this?

they wanted the u.s. to fight on the side of the central powers.

b. the 200th birthday of the united states

to force terrorists groups to stop attacking western targets using massive military force.

it made them more prductive and efficent but with the change of polcies less and les got into the navy