We report Spitzer observations of five newly identified bow shocks in the massive star-forming region RCW 38 .
Four are visible at IRAC wavelengths , the fifth is only visible at 24 { \mu } m . Chandra X-ray emission indicates that winds from the central O5.5 binary , IRS 2 , have caused an outflow to the NE and SW of the central subcluster .
The southern lobe of hot ionised gas is detected in X-rays ; shocked gas and heated dust from the shock-front are detected with Spitzer at 4.5 and 24 { \mu } m .
The northern outflow may have initiated the present generation of star formation , based on the filamentary distribution of the protostars in the central subcluster .
Further , the bow-shock driving star , YSO 129 , is photo-evaporating a pillar of gas and dust .
No point sources are identified within this pillar at near- to mid-IR wavelengths .

We also report on IRAC 3.6 & 5.8 { \mu } m observations of the cluster DBS2003-124 , NE of RCW 38 , where 33 candidate YSOs are identified .
One star associated with the cluster drives a parsec-scale jet .
Two HH objects associated with the jet are visible at IRAC and MIPS wavelengths .
The jet extends over a distance of \sim 3 pc .
Assuming a velocity of 100 km/s for the jet material gives an age of 3 \times 10 ^ { 4 } yr , indicating that the star ( and cluster ) are likely to be very young , with a similar or possibly younger age than RCW 38 , and that star formation is ongoing in the extended RCW 38 region .