Which of the following contributed to the collapse of peace in 1939? select all that apply.

nationalism

appeasement

failure's of the league of nations

wwi peace treaties

WWI peace treaties

Explanation:

The Treaty of Versailles (French: Traité de Versailles) was the most important of the peace treaties that brought World War I to an end. ... Although the armistice, signed on 11 November 1918, ended the actual fighting, it took six months of Allied negotiations at the Paris Peace Conference to conclude the peace treaty.

it the big letter b heart my answer

the  seven  days  battles  were  a series of seven battles over seven  days from june 25 to july 1, 1862, near richmond, virginia,  during  the american civil war. the  seven  days ended with mcclellan's army in relative safety next to the james river, having suffered almost 16,000 casualtiesduring  the retreat.