kimchi lover
  • Member for 5 years, 2 months
  • Last seen this week
Were the first sonic booms predicted?
Accepted answer
46 votes

Yes, and no. A 2003 survey paper "Sonic Boom Research: History and Future" by Plotkin and Maglieri says they were predicted by Mach in the 1870s, were known as "ballistic waves" when caused by ...

View answer
Did this "sledge rigged like a sloop" vehicle ever exist, or was it an invention of Jules Verne?
Accepted answer
41 votes

Yes, and this wikipedia article and this other one describe it. The first article talks about ice boats in America (invented in Poughkeepsie, etc), but the second makes it clear that the Dutch had ...

View answer
Who was this Roman General/figure of authority who, on his deathbed, named these two regrets?
Accepted answer
35 votes

Plutarch's Lives says this about Marcus Cato: He would likewise say ... and that in his whole life he most repented of three things; one was, that he had trusted a secret to a woman; ...

View answer
Was Robert McNamara present at Los Alamos, 1945?
Accepted answer
21 votes

You mean the shorter man in civilian clothes, who is not saluting? If so, probably not Robert McNamara who at the time was a serving officer and would have been in uniform. And, whose job at the ...

View answer
Who are these red flag worshipers from these early maps?
Accepted answer
21 votes

See Historia de gentibus septentrionalibus / auctore Olao Magno ... Magnus, Olaus, 1490-1558 (click here for full Hathi Trust catalog entry for the 1562 edition) or here for Wikipedia's description. ...

View answer
Have any kings ever been serving admirals?
16 votes

King James II was commander of the Royal Navy from 1660 to 1674, during the second and third Anglo-Dutch wars, before he became king. The text accompanying the image of his portrait at the Maritime ...

View answer
Why wouldn't an ASDIC work immediately after a depth charge attack?
16 votes

An underwater explosion creates turbulence in the water, creates bubbles, and perhaps mixes waters of varying temperatures or salinities, all of which affect the refraction of sound in water. For ...

View answer
Does anyone know the history on this artillery shell I found in my grandfather’s shed?
13 votes

This museum catalogue entry describing item number P19960033050 has the following description 6LB ROUND: CYLINDRICAL PIECE OF STEEL WITH POINTED TOP AND LEATHER PAD ON BOTTOM. HAS FLUTED COPPER ...

View answer
Did the US manage to eavesdrop on KMT communications during World War 2?
Accepted answer
13 votes

Evidently, yes. The recently declassified 1946 History of the Signal Security Agency Volume II The General Cryptanalytic Problems has information on this subject. The section covering solution of ...

View answer
During WW2, what B-29 crew role did the abbreviation EMG mean?
11 votes

There was a lot of rapidly changing technology in the B-29's guns during the lifetime of the aircraft, and hence a lot of change in nomenclature for different crew roles. It seems that EMG was used ...

View answer
Where can I find a scan of the translated "De re militari" in Bulgarian?
Accepted answer
11 votes

There isn't one. The idea that there was a pre-Gutenberg Bulgarian translation of Vegetius' De Re Militaria seems to have started with an unsigned article in the 11th edition (1911) of the ...

View answer
What is the context for Napoleon's quote "[the Austrians] did not know the value of five minutes"?
10 votes

Marden is possibly cribbing from chapter 7 of John Gibson Lockhart's The history of Napoleon Buonaparte which seems to have been published in 1829 and reissued many times since. Lockhart wrote about ...

View answer
Where can I find the primary source for Herodotus' Histories?
10 votes

There are early 1500's editions of Herodotus: see the wikipedia article about their publisher Aldus Manutius. That article refers to Works published from the Greeks. Manutius printed thirty ...

View answer
Can anyone identify this possibly Czechoslovak uniform?
Accepted answer
9 votes

This summarizes my since-deleted comments into a slightly more coherent form. It is only a partial answer to the originally posed question, and relies on the photographs the OP added after their ...

View answer
What's this 1607 Hispania coin?
9 votes

It looks to me more like an Escudo than a piece of eight. This web page identifies it as 1 escudo piece, worth possibly $2,500 nowadays. At the time of minting, it seems, an Escudo was worth 16 ...

View answer
Can anybody help identify this uniform ? Circa WW1
8 votes

This is a partial answer. This looks like a German Hussar uniform, as shown on the web page. This style of jacket (called an "Atilla") seems to be a distinct part of the uniform of Hussars....

View answer
What is this symbol in red box?
Accepted answer
8 votes

As justCal suggested, the symbol in question is a ligature of Tls, used as a unit of currency, the value of one tael's weight of silver. The Reports on Trade at the Treaty Ports in China for the ...

View answer
Why didn't the US produce stamped weapons like the Germans during WW2?
8 votes

There is the WWII U.S. M3 grease gun which might count as a stamped weapon. According to the wikipedia article With its stamped, riveted, and welded construction, the M3 was originally designed as ...

View answer
Book about the story of a WWII photo analyst looking for V1 launching ramps
8 votes

The analyst was probably Constance Babington-Smith, whose fascinating 1957 book "Evidence in Camera" tells the whole story. The Wikipedia article https://en.wikipedia.org/wiki/...

View answer
Was Mid-Night always considered the transition point between two days in Gregorian/Julian Calendars?
7 votes

There are things called Nautical time and astronomical day, with Wikipedia entries describing them, where the day begins at noon. Presumably this was useful in specialized trades (ship driving, star ...

View answer
On 15 October 1810 the 92nd Regiment were billeted in ruined houses at Crozendera, Portugal. Can anyone pinpoint this location?
Accepted answer
6 votes

A guess is that the 92nd was billeted at Gozundeira between 15 Oct and 15 Nov 1810. This tiny place is in the middle of the map on page 10 of the very informative modern essay The Lines of Torres ...

View answer
What type of warship is this (likely WW2)?
6 votes

The short answer: a British capital ship (that is, battleship or battle cruiser) mounting 12" guns of the sort described here, that is, any "Dreadnought" built before 13.5" guns ...

View answer
Who was the US town Hayden in Arizona named after?
Accepted answer
5 votes

According to the wikipedia article about Charles Hayden, he was Instrumental in the financing of Arizona copper mines and smelters, the smelting community of Hayden, Arizona was named for him. This ...

View answer
Why does the CIA report on the assassination of Reinhard Heydrich refer to it as "Operation Salmon" rather than "Operation Anthropoid"?
5 votes

The "CIA's secret report" by R. C. Jaggers reads like a "as told by" version of some primary document originating outside the CIA. The CIA of course did not exist in 1942, and its predecessor, the OSS,...

View answer
Why did James Baldwin call it "magnificent twenties"?
5 votes

Maybe it's a reference to the Harlem Renaissance; The Harlem Renaissance is generally considered to have spanned from about 1918 until the mid-1930s.[7] Many of its ideas lived on much longer. The ...

View answer
More honorable to plunder than to work for Germanic tribes in antiquity
Accepted answer
5 votes

Tacitus's Germania XIV says this: In the place of pay, they are supplied with a daily table and repasts; though grossly prepared, yet very profuse. For maintaining such liberality and munificence, ...

View answer
What uniform is this man wearing (circa 1940's)?
4 votes

The photo is blurry and the provided backstory is thin on details, so this partial answer is conjectural. One thing is clear to me, though: this is a picture of a happy man. The subject is wearing ...

View answer
Has the "lion dormant" ever been used in history?
Accepted answer
4 votes

The lion dormant was not unused in heraldry, as a skim-thru of old books shows. Page 150 of Alexander Brunet's 1839 The regal armorie of Great Britain, from the time of the ancient Britons to the ...

View answer
Does anyone recognize this uniform?
4 votes

This is a placeholder for an answer. This is definitely a Polish uniform. The cap shape and collar decoration are distinctively Polish. The cut of the uniform looks World War I-ish. I don't think ...

View answer
Was Martin Luther King's leadership conference Southern Christian or Southern Baptist?
4 votes

According to the SCLC web site, it took about a year for the organization to form, in a series of meetings, changing name several times: in Jan 1957 it was the "Southern Leadership Conference on ...

View answer