The slogan "One, two, three, four! We don't want your fucking war!" was chanted repeatedly at demonstrations throughout the U.S. in the late 1960s and early 1970s. As its latter-day counterpart Hey-hey, ho-ho, Bush's war has to go!, about the Second Gulf War asserted about that operation, the slogan implies that the U.S. military campaign in Vietnam was conceived by the government primarily to primarily to serve its interests.
There are many other pro and contra war slogans, however the mere informational use of those are very small.