Juan manuel de rosas mainly kept law and order in argentina by using terror and tyranny. earning respect and cooperation. imposing harsh fines. enlisting aid from abroad.

answer: what was the us involvement in ww1? although the u.s. tried to remain neutral when ww1 broke out, it finally joined on april 6, 1917 after declaring war on germany. the reason for america to become involved in ww1 was germany's unrestricted submarine warfare, which had already sunk several american merchant ships.

explanation:

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i believe he should not do investment b

to keep us neatruel and not get involved in any wars

he assumed control of treaty negotiations with a hostile power