  The X-ray binary population of the SMC is very different from that of the
Milky Way consisting, with one exception, entirely of transient pulsating
Be/neutron star binaries. We have now been monitoring these SMC X-ray pulsars
for over 10 years using the Rossi X-ray Timing Explorer with observations
typically every week. The RXTE observations have been complemented with surveys
made using the Chandra observatory. The RXTE observations are non-imaging but
enable detailed studies of pulsing sources. In contrast, Chandra observations
can provide precise source locations and detections of sources at lower flux
levels, but do not provide the same timing information or the extended duration
light curves that RXTE observations do. We summarize the results of these
monitoring programs which provide insights into both the differences between
the SMC and the Milky Way, and the details of the accretion processes in X-ray
pulsars.
