Peru is the country that gained control.
The Senate "cools" legislation from the house like a saucer cools coffee. The Senate approves all presidential appointments and ratifies treaties while the house initiates revenue bills.
The Senate has vital powers as stipulated in the constitution under the " advice and consent" provisions, Article II, section 2, to; ratify treaties which require a two-thirds majority of the senators present and a simple majority to approve important public appointments i.e., ambassador and cabinet members.
The Treaty of Versailles meant peace at the times, as it ended the WWI. However, it also established very harsh conditions for Germany (high war reparations), which later led to Germany's poverty and the rize of Nazis to power : so it's blamed for instigating (causing, leading to) the WWII.
The Treaty of Versailles also brought a big land loss for Germany, Austria and Hungary.