THE PAST TWO DECADES HAVE SEEN DRAMATIC PROGRESS IN OUR KNOWLEDGE OF THE POPULATION OF YOUNG STARS OF AGE &LT;100 MYR THAT LIE WITHIN ~120 PC OF THE SUN I.E. CLOSER THAN THE NEAREST WELL-STUDIED STAR-FORMING CLOUDS. SUCH NEARBY YOUNG STARS PROVIDE UNIQUE TESTS OF PRE-MAIN SEQUENCE STELLAR EVOLUTION AND THE LATE STAGES OF EVOLUTION OF PROTOPLANETARY DISKS AND REPRESENT THE BEST TARGETS FOR DIRECT IMAGING SEARCHES FOR GIANT EXOPLANETS. IN THE PAST FEW YEARS GAIA DATA HAVE PROVIDED THE RAW MATERIAL FOR EXHAUSTIVE INVESTIGATIONS OF THE NEARBY FIELD STAR POPULATION IN SEARCH OF CANDIDATE YOUNG STARS YIELDING SEVERAL THOUSAND NEW CANDIDATES. WE PROPOSE A WELLROUNDED INVESTIGATION OF DATA CONTAINED IN NASA'S 2MASS WISE GALEX XMM-NEWTON TESS AND SPITZER ARCHIVES COMBINED WITH SELECTIVE GROUND-BASED SPECTROSCOPY THAT IS AIMED AT EXPLORING AND EXPLOITING THIS TREASURE TROVE. OUR MAIN GOALS ARE TO TEST THE AGES OF CANDIDATE NEARBY YOUNG STARS THAT ARE SUGGESTED BY THEIR POSITIONS IN GAIA COLOR-MAGNITUDE DIAGRAMS CHARACTERIZE THE EVOLUTION OF ROTATION AND MAGNETIC ACTIVITY FOR STARS IN THE AGE RANGE ~5-100 MYR AND FOR THOSE STARS THAT DISPLAY MID-IR EVIDENCE FOR WARM CIRCUMSTELLAR DUST CONSTRAIN THE STRUCTURE AND CHEMISTRY OF PROTOPLANETARY AND DEBRIS DISKS IN THEIR TERRESTRIAL PLANET FORMATION REGIONS. OUR TESTBED WILL BE THE (~50) KNOWN AND (~100) NEWLY IDENTIFIED MEMBERS OF THE EPSILON CHA ASSOCIATION WHICH AT A MERE ~5 MYR OF AGE REPRESENTS THE YOUNGEST KNOWN STELLAR GROUP WITHIN ~100 PC. THE PROPOSED RESEARCH WILL FIRMLY ESTABLISH THE EPSILON CHA ASSOCIATION AND (BY EXTENSION) OTHER NYMGS AS BENCHMARKS WITH WHICH TO CALIBRATE AND INTERPRET GAIA COLOR-MAGNITUDE DIAGRAMS OF YOUNG CLUSTERS IN THE CONTEXT OF THE WEALTH OF NASA MULTIWAVELENGTH ARCHIVAL DATA AVAILABLE FOR CLUSTER MEMBERS. IN SO DOING OUR ADAP-FUNDED STUDY OF THE EPSILON CHA ASSOCIATION WILL PROVIDE A BATTERY OF ESSENTIAL TESTS FOR PRE-MAIN SEQUENCE EVOLUTIONARY MODELS AND THEORIES OF PLANET FORMATION.