What event made the us get involved in world war 1?

The United States entered World War I primarily because of the increasingly aggressive German submarine campaign in the Atlantic Ocean. German activity was seriously disrupting US exports to Europe, which led American businessmen and industrialists to put pressure on the Wilson Administration to enter the war.  

Another event that caused the United States to enter World War I was that in January of 1917, British intelligence would intercept the Zimmerman telegram. The Zimmerman telegram was a secret communication from Germany to Mexico, involving a potential alliance between the two countries should the United States enter the war.

These two events were critical in shaping American intervention, which allowed the United States to side with the Allies against the Central Powers.

the dissolution of the soviet union[a] occurred on december 26, 1991, officially granting self-governing independence to the republics of the soviet union. it was a result of the declaration number 142-н of the supreme soviet of the soviet union.[1] the declaration acknowledged the independence of the former soviet republics and created the commonwealth of independent states (cis), although five of the signatories ratified it much later or did not do so at all. on the previous day, december 25, soviet president mikhail gorbachev, the eighth and final leader of the soviet union, resigned, declared his office extinct, and handed over its powers – including control of the soviet nuclear missile launching codes – to russian president boris yeltsin. that evening at 7: 32 p.m., the soviet flag was lowered from the kremlin for the last time and replaced with the pre-revolutionary russian flag.[2]

previously, from august to december, all the individual republics, including russia itself, had either seceded from the union or at the very least denounced the treaty on the creation of the ussr. the week before formal dissolution, 11 republics signed the alma-ata protocol formally establishing the cis and declaring that the ussr had ceased to exist.[3][4] both the revolutions of 1989 and the dissolution of the ussr also marked the end of the cold war.

several of the former soviet republics have retained close links with the russian federation and formed multilateral organizations such as the commonwealth of independent states, eurasian economic community, the union state, the eurasian customs union, and the eurasian economic union to enhance economic and security cooperation. on the other hand, the baltic states have joined nato and th