  Tidal tails are created in major mergers involving disk galaxies. How the
tidal tails trace the assembly history of massive galaxies remains to be
explored. We identify a sample of 461 merging galaxies with long tidal tails
from 35076 galaxies mass-complete at $M_\star\ge 10^{9.5}\,M_{\odot}$ and
$0.2\leq z\leq1$ based on HST/ACS F814W imaging data and public catalogs of the
COSMOS field. The long tails refer to these with length equal to or longer than
the diameter of their host galaxies. The mergers with tidal tails are selected
using our novel $A_{\rm O}-D_{\rm O}$ technique for strong asymmetric features
together with visual examination. Our results show that the fraction of
tidal-tailed mergers evolves mildly with redshift, as $\sim (1+z)^{2.0\pm0.4}$,
and becomes relatively higher in less massive galaxies out to $z=1$. With a
timescale of 0.5 Gyr for the tidal-tailed mergers, we obtain that the
occurrence rate of such mergers follows $0.01\pm 0.007\,(1+z)^{2.3\pm 1.4}$
Gyr$^{-1}$ and corresponds to $\sim0.3$ events since $z=1$ and roughly
one-third of the total budget of major mergers from the literature. For
disk-involved major mergers, nearly half of them have undergone a phase with
long tidal tails
