An integrated combustion nozzle , comprising: a combustion liner extending along a radial direction (R) between an inner liner segment and an outer liner segment , the combustion liner including a forward end portion axially separated from an aft end portion, a first side wall , and a second side wall , the aft end portion of the combustion liner defining a turbine nozzle, wherein the first side wall and the second side wall each defining a respective opening that extends both axially and radially; a unified head end coupled to the combustion liner , the unified head end being suitable to be in fluid communication with a fuel supply , wherein the unified head end comprises: a first fuel nozzle and a second fuel nozzle disposed at the forward end portion of the combustion liner , wherein a fuel plenum is defined between the first fuel nozzle and the second fuel nozzle ; a first liner portion that extends from the first fuel nozzle and into the respective opening of the first side wall such that the first liner portion forms a continuous surface with the first side wall of the combustion liner ; a second liner portion that extends from the second fuel nozzle and into the respective opening of the second side wall such that the second liner portion forms a continuous surface with the second side wall of the combustion liner . a combustion liner extending along a radial direction (R) between an inner liner segment and an outer liner segment , the combustion liner including a forward end portion axially separated from an aft end portion, a first side wall , and a second side wall , the aft end portion of the combustion liner defining a turbine nozzle, wherein the first side wall and the second side wall each defining a respective opening that extends both axially and radially; a unified head end coupled to the combustion liner , the unified head end being suitable to be in fluid communication with a fuel supply , wherein the unified head end comprises: a first fuel nozzle and a second fuel nozzle disposed at the forward end portion of the combustion liner , wherein a fuel plenum is defined between the first fuel nozzle and the second fuel nozzle ; a first liner portion that extends from the first fuel nozzle and into the respective opening of the first side wall such that the first liner portion forms a continuous surface with the first side wall of the combustion liner ; a second liner portion that extends from the second fuel nozzle and into the respective opening of the second side wall such that the second liner portion forms a continuous surface with the second side wall of the combustion liner . a first fuel nozzle and a second fuel nozzle disposed at the forward end portion of the combustion liner , wherein a fuel plenum is defined between the first fuel nozzle and the second fuel nozzle ; a first liner portion that extends from the first fuel nozzle and into the respective opening of the first side wall such that the first liner portion forms a continuous surface with the first side wall of the combustion liner ; a second liner portion that extends from the second fuel nozzle and into the respective opening of the second side wall such that the second liner portion forms a continuous surface with the second side wall of the combustion liner . <EOS>