5 ▁July ▁ 1 9 5 3 ▁ ▁First ▁Taiwan ▁Stra it ▁Cris is : ▁August ▁ 1 9 5 4 ▁– ▁May ▁ 1 9 5 5 ▁Battle ▁of ▁Y iji ang sh an : ▁ 1 8 ▁January ▁ 1 9 5 5 ▁T achen ▁Ev acu ation : ▁ 7 – 1 1 ▁February ▁ 1 9 5 5 ▁ ▁Second ▁Taiwan ▁Stra it ▁Cris is ▁( August ▁ 2 3 ▁Art illery ▁Battle ): ▁ 2 3 ▁August ▁– ▁early ▁October ▁ 1 9 5 8 ▁ ▁Second ▁Battle ▁of ▁D ad an ▁island : ▁ 2 6 ▁August ▁ 1 9 5 8 ▁ ▁Vietnam ▁War : ▁ 1 9 6 0 s , ▁Dep loyment ▁of ▁small ▁groups ▁of ▁RO C ▁troops ▁dis gu ised ▁as ▁loc als , ▁transport ation , ▁and ▁technical ▁assistance . ▁Not ▁widely ▁public ized ▁to ▁avoid ▁P RC ▁invol vement . ▁ ▁Battle ▁of ▁D ong - Y in : ▁ 1 ▁May ▁ 1 9 6 5 ▁ ▁Battle ▁of ▁W uch ow : ▁ 1 3 – 1 4 ▁November ▁ 1 9 6 5 ▁ ▁Y emen ▁Civil ▁War : ▁ 1 9 7 9 ▁to ▁ 1 9 8 5 : ▁ 8 0 + ▁F - 5 E ▁pil ots ▁plus ▁ground ▁crew ▁sent ▁to ▁North ▁Y emen ▁to ▁boost ▁its ▁air ▁defense ▁at ▁the ▁request ▁of ▁Sa udi ▁Arab ia ▁and ▁the ▁United ▁States . ▁At ▁least ▁one ▁squad ron ▁strength ▁was ▁kept ▁throughout ▁the