The slang of one military generation passes on to the next, so the Marines who called the Koreans gooks in the '50s and the Vietnamese gooks in the '60s and '70s were the linguistic heirs of the Marines who called the Nicaraguans gooks in 1912.
( ( ( ( ( ( ( The slang ) ( of ( one ( military generation ) ) ) ) ( passes ( on ( to ( the next ) ) ) ) ) , ) so ) ( ( ( the Marines ) ( who ( ( ( called ( the ( Koreans gooks ) ) ) ( in ( ( ( the '50s ) and ) ( the ( Vietnamese gooks ) ) ) ) ) ( in ( the ( ( '60s and ) '70s ) ) ) ) ) ) ( were ( ( ( the ( linguistic heirs ) ) ( of ( the Marines ) ) ) ( who ( ( called ( the ( Nicaraguans gooks ) ) ) ( in 1912 ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (NP (DT The) (NN slang)) (PP (IN of) (NP (CD one) (JJ military) (NN generation)))) (VP (VBZ passes) (PP (IN on) (PP (TO to) (NP (DT the) (JJ next)))))) (, ,) (IN so) (S (NP (NP (DT the) (NNPS Marines)) (SBAR (WHNP (WP who)) (S (VP (VBD called) (NP (DT the) (NNPS Koreans) (NNS gooks)) (PP (IN in) (NP (NP (DT the) (NN '50s)) (CC and) (NP (DT the) (JJ Vietnamese) (NNS gooks)))) (PP (IN in) (NP (DT the) (NNS '60s) (CC and) (NNS '70s))))))) (VP (VBD were) (NP (NP (DT the) (JJ linguistic) (NNS heirs)) (PP (IN of) (NP (DT the) (NNPS Marines))) (SBAR (WHNP (WP who)) (S (VP (VBD called) (NP (DT the) (NNP Nicaraguans) (NNS gooks)) (PP (IN in) (NP (CD 1912))))))))) (. .)))
Some military slang terms have been in use for several decades.
( ( Some ( military ( slang terms ) ) ) ( ( have ( ( been ( in use ) ) ( for ( several decades ) ) ) ) . ) )
(ROOT (S (NP (DT Some) (JJ military) (NN slang) (NNS terms)) (VP (VBP have) (VP (VBN been) (PP (IN in) (NP (NN use))) (PP (IN for) (NP (JJ several) (NNS decades))))) (. .)))