  This article summarises three searches for diboson resonances in the
all-hadronic final state using data collected at a center-of-mass energy of
$\sqrt{\rm{s}}=13$ TeV with the CMS experiment at the CERN LHC. The boson decay
products are contained in one large-radius jet, resulting in dijet final states
which are resolved using jet substructure techniques. The analyses presented
use 2.3, 35.9 and 77.3 inverse femtobarns of data collected between 2015 and
2017. These include the first search for diboson resonances using data
collected at a 13 TeV collision energy, the introduction of a new algorithm to
tag vector bosons in the context of analyzing the data collected in 2016, and
the development of a novel multidimensional fit improving on the sensitivity of
the previous search method with up to $30\%$. The results presented here are
the most sensitive to date of diboson resonance searches in the dijet final
state. An emphasis on improvements in technique for vector boson tagging is
made.
