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We present near-IR SINFONI observations of three Galactic HII regions: RVW79,RCW82 and RCW120. We identify the ionizing stars of each region: they are earlyto late O stars, close to the main sequence. We derive their stellar and windproperties using atmosphere models computed with the code CMFGEN. The clusterionizing RCW~79 formed 2.3+/-0.5 Myr ago. Similar ages are estimated, albeitwith a larger uncertainty, for the ionizing stars of the other two regions. InRCW79 the mechanical wind luminosity represents only 0.1% of the ionizingluminosity, questioning the influence of stellar winds on the dynamics of thethe HII region. The young stellar objects show four main types of spectralfeatures: H2 emission, Br gamma emission, CO bandheads emission and CObandheads absorption. These features are typical of young stellar objectssurrounded by disks and/or envelopes. The radial velocities of most YSOs areconsistent with that of the ionized gas, firmly establishing that starformation is taking place on the borders of the HII regions. Outflows aredetected in a few YSOs. All YSOs have moderate to strong near-IR excess. In the[24] versus K-[24] diagram, the majority of the sources dominated by H2emission lines stand out as redder and brighter than the rest of the YSOs.Their H2 emission is mainly due to shocks. We tentatively propose that theyrepresent an earlier phase of evolution compared to sources dominated by Brgamma and CO bandheads. We suggest that they still possess a dense envelope inwhich jets or winds create shocks. The other YSOs have partly lost theirenvelopes and show signatures of accretion disks.

Near-IR integral field spectroscopy of ionizing stars and young stellar objects on the borders of HII regions