The Russian military maintains its Black Sea Fleet HQ and other assets in the Crimea, and in the past few days it has also been sending ground troops.
There are a few low band VHF channels used in the Crimean region by Russian assets. Activity has been noted by well-situated listeners on 30.025, 36.65, and 38.25 MHz, in various modes. The possibility of skip might potentially extend the listening range of at least the 30 and 36 MHz channels.
Here's a bit of what I have for Russian military in the region. Voice comm, obviously, is in Russian. However, quite a bit is still in good old Morse code, CW mode. They use standard procedures, and a lot of Q and Z signals.
Russian Navy Black Sea Fleet, Sevastopol:
3378.0 3826.0 4055.0 5224.0 5312.0 7566.0
10201.0 10543.0 11688.0 12794.0 19201.0 20536.0 21438.0
Assorted air transport:
2013.5 CW Naval Air Transport
4956.0 CW Naval Air Transport
5808.0 CW Naval Air Transport
7662.6 USB Air Transport
7666.9 USB Air Transport
7668.6 USB Air Transport
7685.0 USB Air Transport; selcal, voice w/priyom, data
7696.0 CW Naval Air Transport
7883.1 USB Air Transport
7884.5 USB Air Transport
7980.0 CW Naval Air Transport
7988.0 CW Naval Air Transport
8120.0 CW Naval Air Transport
8682.0 CW Naval Air Transport
8816.0 USB RJF94/PRIBOJ Moscow Command
11254.0 USB Central Sector
11354.0 USB RMP/RIW/RJF94/etc Moscow
11360.0 USB Central Sector
Moscow Air Force HQ (REA4):
1176.0 2721.0 4379.0 5158.0 7054.0 11407.5
Ukraine AF net:
8974.0
Assorted Air Force:
6685.0 USB AF night strategic command net
8131.0 USB Katolik
8816.0 CW RCB
11360.0 USB Korsar
11233.0 USB AF strategic forces
Air Force IDs:
Akustik Joint Strategic forces
Avora Volgograd
Balans New, unk
Davlenie AF, Taganrog
Gazelle Joint Strategic forces
Kansek Joint Strategic forces
Katolik New, unk
Klarnetist AF, Tver
Korsar AF, Pskov
Kraket Air Transport, Western Sector, Kaliningrad
Maska Joint Strategic forces
Midyalka Joint Strategic forces
Monolog Air transport, eastern sector, Vladivostok
Nabor Joint Strategic forces
Nezyanka Joint Strategic forces
Norka Naval aviation, southern sector, Sevastopol
Novator Naval aviation, northern sector, Murmansk
Ochitska Joint Strategic forces, Moscow?
Polis AF, Orenberg
Priboj Air transport, central sector, Moscow
Procelka Joint Strategic forces
Proselok AF, Bryansk
REA4 Collective stragegic AF c/s
Saksofon Joint Strategic forces
Seriozhka Astrakhan
Shlagata Joint Strategic forces
Shpora Joint Strategic forces, Rostov
Shtat Sochi
Stavok Vladikavkaz
Sympatia Joint Strategic forces
Triol Elista
