Which event is an example of the alliance system? a. one country engages in a military arms race with another country b. one country attacks another because of a promise it made to a third country c. a country conquers many other countries to exploit their resources d. a country loses control of many of it's overseas colonies

B. One country attacks another because of a promise it made to a third country

Explanation:

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"the gulf of tonkin resolution in 1967".

the gulf of tonkin resolution (officially called southeast asia resolution, public law 88-408) is a law issued by the congress of the united states of america on august 7, 1964, in which president lyndon b. johnson was authorized1 to act in a comprehensive manner against the democratic republic of vietnam, which he accused of aggressions against us ships in the gulf of tonkin, where the resolution takes its name. the gulf of tonkin resolution is of historical importance because it gave authorization to the us president. lyndon b. johnson, without a formal declaration of war by congress, to use military force in southeast asia.