File:Thai army O2.png|<!--''Roi Ek'' (ร้อยเอก)<br>Royal Thai Army-->
File:US-O3 insignia.svg|<!--US Army, US Air Force and US Marine Corps.<ref>The US Marine Corps insignia for captain is slightly different from the USA / USAF insignia depicted above in that it lacks beveled edges and the cross-bars are further towards the ends. See collar insignia for [[نقیب]].</ref> -->
File:Confederate_States_of_America_Captain.png|<!--[[Ranks and insignia of the Confederate States|Confederate Army]] (American Civil War)-->