A turbomachine, comprising: a plurality of transition ducts disposed in a generally annular array, each of the plurality of transition ducts comprising an inlet, an outlet, and a passage defining an interior and extending between the inlet and the outlet and defining a longitudinal axis, a radial axis, and a tangential axis, the outlet of each of the plurality of transition ducts offset from the inlet along the longitudinal axis and the tangential axis, each of the plurality of transition ducts further comprising an upstream portion and a downstream portion, the upstream portion extending between the inlet and an aft end, the downstream portion extending between a head end and the outlet; and a late injection assembly disposed between the upstream portion and the downstream portion of a transition duct of the plurality of transition ducts, the late injection assembly providing fluid communication for an injection fluid to flow into the interior downstream of the inlet of the transition duct, the late injection assembly comprising a late injection ring and a flow sleeve generally surrounding the transition duct, the flow sleeve comprising an inlet, an outlet, and a sleeve passage extending between the inlet and the outlet, the flow sleeve further comprising an upstream portion and a downstream portion, the upstream portion extending between the inlet and an aft end, the downstream portion extending between a head end and the outlet, and wherein the late injection ring is further disposed between the upstream portion and the downstream portion of the flow sleeve, wherein the late injection ring is connected to the aft end of the upstream portion and the head end of the downstream portion of the transition duct, the late injection ring defining a main conduit, the main conduit extending between an inlet and an outlet, the inlet defined in a downstream side of the late injection ring for accepting working fluid for mixing with fuel within the late injection ring, the outlet in fluid communication with the interior of the transition duct. a plurality of transition ducts disposed in a generally annular array, each of the plurality of transition ducts comprising an inlet, an outlet, and a passage defining an interior and extending between the inlet and the outlet and defining a longitudinal axis, a radial axis, and a tangential axis, the outlet of each of the plurality of transition ducts offset from the inlet along the longitudinal axis and the tangential axis, each of the plurality of transition ducts further comprising an upstream portion and a downstream portion, the upstream portion extending between the inlet and an aft end, the downstream portion extending between a head end and the outlet; and a late injection assembly disposed between the upstream portion and the downstream portion of a transition duct of the plurality of transition ducts, the late injection assembly providing fluid communication for an injection fluid to flow into the interior downstream of the inlet of the transition duct, the late injection assembly comprising a late injection ring and a flow sleeve generally surrounding the transition duct, the flow sleeve comprising an inlet, an outlet, and a sleeve passage extending between the inlet and the outlet, the flow sleeve further comprising an upstream portion and a downstream portion, the upstream portion extending between the inlet and an aft end, the downstream portion extending between a head end and the outlet, and wherein the late injection ring is further disposed between the upstream portion and the downstream portion of the flow sleeve, wherein the late injection ring is connected to the aft end of the upstream portion and the head end of the downstream portion of the transition duct, the late injection ring defining a main conduit, the main conduit extending between an inlet and an outlet, the inlet defined in a downstream side of the late injection ring for accepting working fluid for mixing with fuel within the late injection ring, the outlet in fluid communication with the interior of the transition duct.