By Alexander Tanas CHISINAU (Reuters) – The leader of Moldova’s pro-Russian separatist Transdniestria region called on its defence and intelligence institutions on Monday to maintain a “high level of military preparedness” and hold regular drills for that purpose. Transdniestria broke away before the 1991 Soviet collapse and fought a brief war against the newly independent state, one of Europe’s poorest countries lying between Ukraine and Romania. For more than three decades, the sliver of land has remained on Moldova’s eastern fringe with little turmoil – 2,000 Russian “peacekeepers” remain o…